English

1. MANUAL PREVENTIVE MAINTENANCE AND CORRECTIVE OF HARDWARE
AND SOFTWARE ON THE PC
SENA
MEMBERS
Luis Felipe García
Marcela Bonett
Flor caro vega
Pedro Nuñes
INSTRUCTOR
Alfonso Caro
BOGOTA D.C
MAYO DEL 2011

2. Conceptualization
Software
It is a generic term for the programs that run inside of a computer. In this case
possibly Windows operating system or operating programme that gives life to your
computer, as well as you can now see this information on your screen.
Hardware
It is commonly used for the physical components of a computer or a computer. This
is the most basic level on which the computer runs. The dominant to remember is
that the information is processed electronically by the hardware. The pc is prepared
as a computer or personal computer. The monitor, keyboard, and mouse (parts of
your hardware) are connected to the system unit.
 Where does the information processed?
The information that is processed obviously must be where leave to be used and
these means are: the monitor screen, the printer or printer, speaker or speaker.

3.  Classificatión of operating systems
Operating Systems can be classified as follows
1. Multi-user: allows two or more users to use their programmes at the same
time. Some operating systems allow hundreds or thousands of users at the
same time.
2. Multiprocessing: supports opening the same program on more than one
CPU.
3. Multitasking: allows you to run several programs at the same time.
4. Multitramo: allow various parts of a single program to run at the same time.
5. Real-time: responds to the entries immediately.
 How an operating system
Operating systems provide a software platform on which other programs, called
applications, to function. Applications are programmed so that they work on a
particular operating system, therefore, the choice of the operating system largely
determines the applications that you can use.
The most used in the pc operating systems are two, os / 2, and windows, but there
are others that are also used, like for instance Linux.
 How to use an operating system
A user typically interacts with the operating system through a system of commands,
for example, the operating system windows contain commands such as copy and
paste to copy and paste files respectively. The commands are accepted and
executed on the one hand operating system called command processor or
interpreter from the command line. Graphical interfaces allow you to use the
command pointing at objects that appear on the screen.
 How is distributed spyware?
Generally the spies arrive at a computer to download a program or seemingly
harmless game from the internet or from file-sharing programs. There are times
that the program is actually harmless, but has been manipulated to include
software spy as it was the case of a version of the Kazaa. We can also be affected

4. by these programs when we browse on the Internet with low security or if we
accept any request that comes from a site. There are pages which tend to be quite
insistent when we press the "No" to deny the request; These are usually the most
dangerous.
 How to remove spyware
There is large number of programmes antispyware or software to help find and
eliminate spyware, although some of them what they do is install new spyware,
because that some spyware take advantage of the weak points of Internet Explorer.
We recommend using a browser less venerable as
Firefox or Opera (both are free).Award-winning protection antispyware which
guarantees the protection of your PC from threats of tracking of your privacy.
Spyware Doctor
Spyware Doctor now includes analysis of reports, profiles of behaviour and
protection reports cards to provide up-to-date protection and an analysis of the
status of your PC.
It is an anti-spyware that detects, removes and blocks all types of
spyware, adware, Trojans spyware, keyloggers, phishing identity,
browser hijackers, threats of tracking, evil anti-spyware, unwanted
software, electronic fraud, pop-up Windows and corrupted web sites. It
includes Smart Update updates and Schedule tasks.
Anti-spyware is known as the best and Google includes the trial version in the
Google Pack. He has received numerous awards from leading computer
publications (PC Word, PC Magazine, PC Pro, PC Plus, PC Authority, PC
Utilities, PC Advisor, PC Choice, Microdatorn, competence Bild and PC
Answers Magazine) and around the world testing laboratories highlighted it for
their qualities.

5.  What is computer maintenance?
Maintenance is one that I use to have the computer equipment, in excellent
condition provided that create programs to perform these manutenciones and have
the necessary elements for this. There are two types of
maintenance, the preventive and the corrective.
 Preventive Maintenance
Preventive maintenance is the periodic revision of certain aspects, both hardware
and software on a PC. These influence the reliable performance of the system, in
the integrity of stored data and an exchange of accurate information, to the
maximum possible speed within the configuration optima system.
Preventive maintenance in general dealt with in the determination of operating
conditions, durability and reliability of a team, in reference to this type of
maintenance helps to reduce the time that can be generated by corrective
maintenance.
OBSERVATION
Most of the failures come from layers of dust that accumulate in the internal
device which causes overheating and gives as a result the damage of the
component or that her plots are encouraged.
 Corrective Maintenance of a Computer
Corrective maintenance is done when it is necessary to correct or repair any
problem that is going on in the PC which can be software or hardware respectively.
Corrective maintenance of software is to correct a problem either programs or the
operating system. When need to replace a mouse, keyboard, source of power,

6. speakers, memory card, motherboard or expansion or in the latter cases should be
a small welding is speaking of corrective maintenance of hardware.
 Preventive maintenance
It is recommended to perform a maintenance every 6 months if the computer
equipment is not widely used either every 4 months if this constantly is in use. But it
is very important to do it every 2 months if the PC is used every day, more so if the
Internet network is used constantly.
Whenever the use of a PC is at risk of that will break down a card, Mouse, or any
part of the Pc. But also where there are likely to find more problems that harm the
PC is on the Internet because that's where unintentionally it can infect any
computer with a virus of any kind and that hampered the proper functioning of any
computer equipment.
 What does the preventive maintenance
Preventive maintenance can detect failures repeated, decrease the points killed by
stops, increase the useful life of equipment, lower costs of repairs, detect weak
points in the installation from a long list of advantages. Including common
peripherals e.g.: CPU, mouse, etc.; as well as keep it free of pollutants such as
liquid, powder.
 Steps to remove the computer processor or CPU
The first thing is to remove the fan or heatsink of heat (remember to
disconnect the card the Fan Heatsink has a thin cable that is connected to
the mainboard), the second is to remove the piece of aluminum that has the
processor, this is done with care, the pieces of aluminum usually stop them
with pieces mounted pressure, Sun or you should see are the pieces that
have to be move to remove it and then do the same with the other sideThe
third would be to remove the processor has to throw a small switch and take

7. it with an antistatic bayetilla or guates of latex. To be able to remove it
without any problem.
 Steps to clean the computer processor or CPU
If he will clean up and has shifted the microprocessor (CPU) (be careful not to
touch the pins) must have an antistatic bayetilla to clean the processor only on the
basis where there are no pins and it must be applied a little bit of dissipative cream
on the base where you will place the heat sink for the part where She is clean and
is again inserted in the slot so that is the base where you will place the processor
noting that it is placed in the corresponding pins.
OBSERVATION
Many times the processor is clean, so is not recommended to remove it, since in
some cases the pins may bend or break easily. Between the processor and the
heatsink, there is a thermal paste which should not touch or remove because the
lack of this means that the processor is hot. In any case the only thing that could
clean up serious fan and the heatsink without remove the processor and remove
the paste attached to the heatsink.
 Maintenance classe a computer monitor
Maintaining external
Follow these steps
(apague_el_monitor_y_el_computador,_2) unplug the monitor from the wall
outlet, 3) clean with a soft bayetilla screen and Cabinet, if it is necessary to use
a blower.

8. Housekeeping
Follow steps 1 and 2 of the previous maintenance
Observatión It
is necessary to have a blower or a can of compressed air
3) (Destornille if it is necessary to remove the back cover of the 4 monitor) without
touching any components of the monitor blow the inner part to remove dust and dirt
accumulated. (5) again and tape the monitor having the care necessary to not
break anything.
Caution
You should not use benzene, thinner, or any other volatile substance to clean the
monitor. These chemicals can damage it.
Differences – SIMM DIMM- DDR
DIMMs are used in personal computers RAM memory modules. The DIMMs are
recognizable externally by having your contacts (or pins) separated on both sides
measuring 13 inches and have 168-pin. Sokar them them they are black and carry
2 notches to facilitate their placement. Can handle 64-bit once and they are the
famous SDRAM PC66, PC100, PC133... This number belongs to the speed of the
bus., unlike the SIMM possessing contacts so that one side are United with the
connectors on the edge of the modulewith about 8.5 cm in length and 30
connectors this is the biggest difference with respect to their successors the
DIMMs.
DDR are composed of memory synchronous (SDRAM), available in encapsulated
DIMM RAM memory modules, which allows the transfer of data by two different
channels simultaneously in a same clock cycle. The DDR modules support a
maximum capacity of 1 GiB (1 073 741 824 bytes). The bandwidth of the
module can transfer an amount of information of 8 bytes in each clock cycle to the
above frequencies. Information can be transferred through a channel only, so it is
only necessary to introduce all DIMM modules in the same bank of slots. Or they
can exchange data with the bus through two simultaneous channels, one for each
bank.
SIMM
DIMM
RAM

9.  Protection should be taken into account for the maintenance of the Pc
You must have the pc disconnected from the outlet, have excellent lighting to avoid
possible damages, take into account (electrostatic discharge) protection equipment
that consists of a wristband with a cable to land called bracelet unsightly if you want
to have a special mat, also with his cable to land. The use of this equipment to work
within the system will help you make sure to never destroy any of the components
with an electric shock.
 As the RAM should be handled to not to cause harm
When you want to do cleaning up the RAM to do is remove RAM memory by
avoiding the direct contact of the connection pins with your fingers, it is
recommended to use an antistatic handle because if not handled very carefully they
may be damaged by static energy, at the time of install it again should have cleared
all the dust of the module DIMM, to install only should play the module RAM edges
by pressing with the thumbs.

10.  As a hard disk is formatted
There are two possible cases
1-that the disk reformat, is or will be the operating system's disk. 2.-that is a data
disk. The second case, does not present any difficulty, and can format from the
command line (format as from the graphical interface 1) my pc, 2) right click on the
disk drive, 3) format 4) click on home.
EXAMPLE
2y3
1

11. 4
 Como se desfragmenta un disco duro en Windows

12. The use of the defragmented is very simple, in "My PC or team" where it has your
disk drive to the right (D) and partitions (if you have them), in the example would be
(C). It will mean is desfragmentara the drive C.
We're going to "Properties" and give you left click, get out a table of dialogue
It now clicks on “Tools” and will get a new dialog

13. Should be on the button "Defragment now."
What will be the first thing you should do is to select the partition (we had said that
we will do it on (d) and we are first going to "Analyze" to inform us whether it is
necessary or not defragmenting, so is to click on the button and begins to analyze).

14. From there it can click on "Defragment" (to avoid having to return to the previous
screen)
There are many white and red vertical lines which means respectively I have many
"spaces" between sectors and many "fragmented files" over D, so what will the
defragmented is logic: try to put everything together so that all sectors (or most) in
blue-displayed must be taken into account that green spaces are fixed so it will
remain there (are always system). After several minutes (which will vary
according to the power of your PC), will be a message saying that the
defragmentation has been completed:
If you click on the button defragment begins the process and displayed on the bar
of estimated disk usage after defragmentation displays the disk's status during the
defragmentation process, which will vary as the process advances

15. The defragmentation operation is an operation that is quite time make her,
depending on the size of free disk, the rate of fragmentation of the files and the
characteristics of the team. We must bear in mind that we may not use the
computer during the process of fragmentation, so it will have to think the best time
for a defragmentation, the lunch, breakfast time, while we carry out any other
activity that we don't need the computer orIf necessary, at night while you sleep.
We see a similar report to that we presented during the analysis of the
defragmentation of the disk, but already with the carried out defragmentation

16. After the defragmentation is presented to us the following message
Conclusions
Once we have finished the process, our hard disk is again in perfect conditions of
work and we can enjoy it. We must bear in mind that it is appropriate to perform on
a regular basis, at least the analysis to verify the degree of defragmentation of your
hard drive, especially when we have subjected to continuous operations of
recording files, more so if these files are large and deletion, as RAW type, is the
case in the editing processes of video or images in high resolution formats or any
program that uses files large and with many operations of reading / writing.
 How to install the operating system Windows xp
It must be done without loading the entire operating system. To this end, a startup
with an operating system disk is used. The steps to perform are. With the pc
turned off, insert the disk OS, in the CD - ROM drive home and later, with the CD
and released, turn on the pc. So the first thing we do is go to the BIOS Setup, to get
our Windows installation CD to start once we turn our PC and place the installation
CD in the CD/DVD drive.
To enter the BIOS Setup by pressing Delete, F2 or F11 (depending on the model of
motherboard) turn anything else on our PC.

17. Look for the Advance Bios Features option in the BIOS Setup and press ENTER on
this option.
We will post the following: First Boot Device CD-ROM, Second Boot Device -
HDD-0
We return to the previous menu and select Save & Exit Setup and accept with
ENTER.

18. Note: The settings of the Setup can change from one to another. In other BIOS
boot sequence is in the section Boot Secuence instead of being included in
Advance Bios Features. With the CD-ROM in the CD/DVD drive-restart the
computer to start the installation of Windows XP will appear a message press any
key. The installation will begin to copy files and to start devices, we will wait.
When we get to this point in the installation press ENTER to confirm the installation
of Windows on a hard drive.
It will then show us the license of Windows that we accept pressing F8 to continue
installing Windows XP.

19. We will now prepare the hard disk to install the Windows XP files. Select a partition
if any and eliminate by pressing D.
We confirm its elimination by pressing L and then ENTER.
Below is presented the space not partitioning that will be similar to the volume of

20. the partition you just delete. Press C to create the partition, and will accept the
confirmation with ENTER.
In this new screen select a quick NTFS disk format and press ENTER.
If we have any suspicion of failure on the disk is better not to use the option of
formatting fast and do a normal formatting. This will take us much longer, but will
check us the integrity of our hard drive (at least in the partition, which is the most
important).
Then the partition is formatted, the basic files will be installed and automatically
restarts the computer as shown in these images. While we wait without pressing
any key.

21. 1 2
* Now the installation will continue to be graphic and more easily.
We will leave to follow the course of the facility waiting to be required to introduce
configuration options.
Enter the details of language and geographical location when we see this screen.
We then ask the name and the Organization to which we belong. We fill the data
and click Next.

22. Then ask us to introduce the key to our Windows, introduced once click Next.
We must now give a name to your computer, the default is fully valid even if we can
get one that is easier to remember. We will also write an administrator password to
provide greater security for our team.
Once complete click Next.
The following is to adjust the date and the hour of our system, as well as the time
zone where we are.
After completing this process click Next again.

23. When we get to this screen, enter the network settings. If we do not have a network
at home or do not know the parameters of the network, we will leave the values by
default and click Next.
From this point the installation will continue with copying files. Now the computer
will reboot, and we should not press any key, so that it will not boot from the CD.
The installation will ask us the latest configuration data. Configure the screen
accepting all the menus that appear.

24. 1. .
2
We accept the first display of completion of the installation of Windows XP. We
omit the check of the Internet connection.

25. This screen is to activate your copy of Windows. If we are connected to the Internet
(by a Reuter) choose the option Yes, activate Windows online now. Otherwise
select No, reminded me in a few days.
Then enter the user names of people who will use the equipment.
Note: This step is very important for a correct configuration of the computer, it is at
this point that is going to define the user that will make the functions of
administrator (the first to say). The omission of this point is one of the main causes
of subsequent failures of the system.

26. This completes the installation of the OS
Now we can only verify that Windows has recognized and loaded all the drivers we
need. Otherwise install the drivers missing us (graphics card, sound card etc.).
These drivers should have in the CD of the motherboard (if they are integrated) or
in the Cd's for.
Note
with this type of installation are deleted all the files of your computer, so it should be
a reinstatement, we save all the data that we have it on external media such as
USB memory devices or Cd's DVD'sbefore you begin the installation.

27.  Antivirus for S.O
A good antivirus software should have a good heuristic, which is the technique that
use antivirus to recognize malicious code (viruses, worms, Trojans, etc.) and that
they are not in your database. Statistics have shown here that the Kaspersky and
Nod32 antivirus (both payment) and the Avast (A free antivirus).
• The follewing antivirus are recommended because of its
effectiveness
1. Kaspersky is an antivirus that provides very good protection both reactive
and preventive, protecting you from viruses, Trojans and all kinds of
malignant programs. In addition also undertakes to protect your log and your
whole system against potentially dangerous programs like spyware.
Kaspersky has proved to be one of the antivirus that has a better 'search
and capture' analysis of virus.
2. Avast is a good free antivirus that derects virus of all sorts, malware such as
Worms, Trojans and other able to modify themselves. With this antivirus, the
likelihood of the income of threats is greatly reduced to surf the net and also
operates in way such that you do not perceive the analysis carried out on
files that are running. In addition, conducts deep scans of your hard disk,
checking the integrity of all of its content and facilitating the recover y of files
damaged as a result of infections. It protects the system from the most
dangerous virus today, known as the macrovirus and resident viruses.
Integrantes with Windows Explorer, so you can scan files from the context
menu and updates virus databases on a daily basis.
3. NOD32 is an antivirus of quality and very efficient. It has a certain virtually
absolute in the detection of any known virus and still unknown due to its
complex heuristics. One of its features are the low use of system resources,
detection of viruses and codes "malicious" very high percentage, speed of
searches, detailed heuristic analysis, numerous possibilities of disinfection
without deletion, recovery from damage caused by virus options, code 32-bit,
etc. It is an anti-virus of first quality, on the basis of their potential in its speed

28. and the total detection of the vast majority of threats.
Su elección será la mejor para su equipo
PLUGINS FAULT SIGNIFIERS THAT ARE PRESENTED TO USERS
THE COMPUTER WILL NOT START
must first review the electrical installations looking decision-making and wiring
electrical and perhaps stabilizer or in some cases the towers have ignition switch in
the back opened be reviewed everything to verify that both the power outlet and the
wiring is well can connect another machine there with the same cable or a dexter in
the outlet I confirm that if is used if it is fine everything from cabling and power
outlet and still not turn on cable to both the monitor and the tower when I
disconnect because this offline I am about to disassemble the Tower removing the
screws of the covers to then open these and thus look the connection of a source
with the main board if it is well connected I start reviewing all connections if they
are I can either disconnect all the connections of the main board and to verify that
the power source is working I can create a bridge with a pin of black and a green
pin can make bridge connection with a clip that helps me to join the two previously
named legs if doing the fan moves this means that the source if it works correctly.
The bridge can be so
But if doing so does not work the fan that wants to say that the source of power is
not used and it is likely that you touch change it to enable and turn on the
computer.

29. WARNING
Do not perform this procedure but previously known steps and measures of
protection.
But if the source with this test if it works and even turn on the computer
clean connections with clean contacts and check that the switch has good your
connection depending on the map of the main board and if bad her connect this
possibly make it work but if it is good to check the main board is perhaps damaged
processor or any other part of the main board because this fix will correspond an
electrical engineer.
DA NO VIDEO EQUIPMENT
the monitor turns on but this this black screen, look at electrical installations again
as with the previous problem I look also to the video connection this well both the
monitor and the Tower if they are well can try the monitor on another tower to rule
out that it is the monitor that does not give video if it works normally with another
Tower I rule out that it is the monitor and I focus on the tower to review it I
disconnect all external connections of the monitor and the Tower already
disconnected remove the screws of the lids and open the Tower check the video
card probandola in another Tower if it doesn't work is that this damaged the video
card and If it is so simply change by one serving.
THE MONITOR DOES NOT IMAGES ARE ALL THE COLORS
Just on the desktop give you right click (1) properties then get me a window with
the options of (2) display properties give you click on (3) configuration (the quality
of the color must be in 32-bit).

30. NOT FOUND THE OPERATING SYSTEM

31. It may be because perhaps no operating system installed or that the hard disk is
damaged or there is any damage file systems within the system operating this I
must then remove the hard drive and can be in another Tower putting it as a slave
and so make a backup of the information that is in This what formatting and I
connect again to the Tower initial changing it again to master and install the
operating system.

32. NO MOUSE POINTER IS MOVING
possibly the mouse disconnected and the system does not recognize this
peripheral or possibly the PS/2 pins are twisted if they are twisted can straighten
but if they are parties to change the mouse but if the problem is already in the main
board you must install a USB card to mouse but if they are well connectors I test on
another computer then I come to connect the mouse and reboot the system so that
it recognizes, but does not work if you can right-click this dirty in such a way
remove you the screws of the party less I open and so clean clean contact and
again it to join and if it doesn't already It is problem or it mouse or its connector we
would have to change it but not to repair it.
Or for a more simple than the mouse case this good but that monitor the cursor
does not move should be also because this has locked up and it can be solved by
pressing CTRL and 5 option appears administrator tasks to give click there get me
this Windows.
I would like to end task, and this close me the program that I have blocked the
cursor this may be another possible problem with solution.
THE KEY DOES NOT RESPOND

33. possibly the keyboard this disconnected and the system does not recognize this
peripheral or possibly the PS/2 pins are twisted if they are twisted can straighten
but if they are parties to change the keyboard but if the problem is already in the
main board you must install a USB card keyboard but if they are well connectors I
test on another computer then I proceed to connect the keyboard and reboot the
system so that it recognizes, but if it does not work it may be that harm will come of
the membrane or card and these parties must change if it is not the case and their
internal parts are fine but the problem persists can be that the keyboard this dirty in
such a way remove you the screws of the party less I open and so clean clean
contact and again it to join and if it doesn't already a problem or keyboard and its
connector We would have to change it but not to repair it.
THE COMPUTER IS SLOW AND GENERATES ERROR CONSTANTS ON THE
SCREEN
the main reason may be because the hard drive this very full, the information may
be fragmented information can be des fragment with a defragmented hard drive
found in the operating system or the hard disk this next to damaged must be
changed or you may also be slow by wiring or sub-procesos you can be updating
the operating system or the antivirus can be that the operating system this gradient
and gives errors or possibly has many viruses can format or install a new operating
system if it requires it.
Another reason why the computer may be slow should be because it is very full of
temporary (temporary are visits carried out on a daily basis is that they are stored
or the records reviewed sites) to remove them I can do the following procedure:

34. Join the start button
Then I will run
I write the following in run

35. Typing this in run appear all the time as well
Then select where you want to remove and oprimo shift+supr to eliminate them and
that do not appear me in the trash again.
And so I deleted them causing the computer faster.
THE UNIT OF CD-ROM CD-WRITER OR DVD-ROM DOES NOT READ THE
CDS:
look at the internal connections for this must disconnect all the connections of the
monitor and the Tower then remove the screws and open the lids of the towers in
such a way I can examine connections by making me to the main board you this by
providing enough voltage to the connectors on the drives and the data connection if
they are well users online and corresponds to the set voltage can have possible
internal damage in the optical reader if you do you change the unit but if only it's dirt

36. is done with blower and cleaning with a CD of cleaning and a bit of isopropyl
alcohol (to recognize a cleaning CD this comes with) a small brush which is
impregnated with alcohol and this makes you clean the CD-ROM CD-WRITER or
DVD-ROM drive.
These common failures are continuously presented to users, was solved by
means that questions were technical support Ilyich Mauritius antolinez
Interviews
INTERVIEWS with users of the capacity of bogota d.c
LABORATORY TOOLS HERRAMIENTAS DE LABORATORIO

37. • request for technical support and troubleshooting:nº de caso: 2
• time and date of interview: 27/04/2011 10: 06 am
• description of the support: the printer does not work does not print it
• solution provided: checked the brand of the printer and the ip address
that is the port that is using the other computer for printing and look in
the computer effectively does related such way is configured the printer
to the computer and both wanted the (IP) port and are looking for the
printer are send a test print and is functioning normally
• Officer (a) applicant: light nery flowers león
• Unit: legal advice Office
• extension:466
• Case No: 3
• time and date of interview: 27/04/2011 10: 15 am
• description of the support: the monitor is blocked
• provided solution: it can be verified and effectively on the monitor does
not respond is not moving or the cursor of the mouse in such a way the
mouse disconnects reconnects then push CTRL and given her task
manager option is given to end task restarts the system and is solved the
problem.
• Officer (to) solicitante:jaffiza Ivonne amador namen
• Unit: Branch Office
• extension:106

38. • Case No:5
• time and date of interview: 27/04/2011 10: 40 Am
• description of the support: does not recognize the keyboard
• solution provided: disconnects and reconnects the keyboard restarts the
system and the problem is solved
• Officer (to) Castilian solicitante:zoila defiles
• Unit: Police Affairs
• extension:131
• Case No:11
• time and date of interview: 28/04/2011
• description of support: to save a file in Word and then reopen it in open
office it appear read-only for this reason doesn't it change.
• solution provided: makes a copy of the Word file and sticks in an open
office file.
• Officer (a) applicant: ario lozano Alfonso Asprilla
• Unit: jurisdictional
• extension:296

39. Guarantees and policies
Glossary
Computers are composed of a series of electronic components that are responsible
for their proper functioning. These include
• Central unit of processes (CPU): is the brain of the pc. He is responsible for
processing instructions and data that the computer works. The processor is the
most important device and which most influences his speed to analyze information.
• Memory RAM or main memory: is the random access memory, stored instructions
and data for programs to ensure that the CPU can access them directly through the
external high speed data bus.
The RAM is known as a read/write memory, to differentiate it from the ROM. It is
said that in the RAM, the CPU can write and read. For this reason, most of the
programmes allocated part of the RAM as a temporary space for storing data,
which allows to rewrite. As it does not retain its contents, turn off the computer it is
important to save the information.
The amount of RAM memory rather influences the speed of a pc. Among more
memory RAM you have, faster work and more programs may have open at the
same time.
• Memory ROM: it is the memory only for reading. It is the part of the main storage
of the computer that does not lose its contents when power is interrupted. It
contains essential programs of the system that the computer or the user can be
deleted, as those that allow you to start the operation every time you turn on the
computer.
• Memory ROM: it is the memory only for reading. It is the part of the main storage
of the computer that does not lose its contents when power is interrupted. It
contains essential programs of the system that the computer or the user can be
deleted, as those that allow you to start the operation every time you turn on the
computer.
• Hard drive: is the device of secondary storage that uses
multiple hard drives of a magnetically sensitive material. It is
housed, together with the heads of reading in a sealing
mechanism in hermetic manner, which saved programs and all files created by the

40. user when working with these programs. Between more ability to have a disk hard,
more information and programs can be stored on your pc.
The capacity of the hard drive is measured in gigabytes (GB). A GB equals 1,024
megabytes (MB) for approximate mind.
• Cache: is a small unit of ultrafast memory which stores information that has been
accessed recently or that are accessed frequently, which prevents that the
microprocessor has to retrieve this information from slower memory circuits.
The cache is usually located on the motherboard, but sometimes it is integrated
into the processor module. Data storage capacity is measured in kilobytes (KB).
While more cache has the computer it is better, because you will have more
instructions and data available in a faster memory.
• Motherboard: is circuit board containing the processor, or CPU, RAM,
microprocessor support chips and expansion slots. These are those that allow
insert, for example, the sound (which allows the pc to play sound), the internal
modem (which makes it possible to surf the internet) or the graphics card or card
video (which allows to display images on the screen).
• CD-ROM: this unit is used to read CDs, whether these programs, music or
multimedia (sounds, images, texts), such as encyclopaedias and video games. The
speed of this unit depends on two factors: the rate of data transfer and access time.
Data transfer rate refers to the amount of data that the unity of CD - ROM can send
to your pc in a second. This rate is measured in kilobytes per second (kbps) and
indicated with a number next to a x, e.g.: 16 x, 24 x, 48 x. While more x, faster.
Access time refers to it takes the entire process.
• CD drive: this drive reads and writes on CDs. These discs are used to save and
read information, but in contrast to the hard disk, which is fixed inside the pc, can
enter and get out of the unit, so enable transporting data from one side to another.
The CD's have a very high capacity for data storage.
The essential data entry tools are called input devices: input devices incorporate
the information into the drive of the pc system.

41. Keyboard: it is an input device consisting of a system of keys, such as the of a
typewriter, which allows input data the computer or digital device.
When you press a character, an encrypted entry is sent to the computer, which
then shows the character on the screen. Numeric keypad refers to the set of keys
with numbers in the right hand side of some keyboards.
The keys on the keyboard of the computer are usually classified follows:
• alphanumeric keys: letters and numbers.
• keys of punctuation: comma, point, point and comma, among others.
Special keys: function keys, control keys, arrows, key caps, among others. Mouse /
mouse: piece of hardware connects your computer to help you control the
movements of the cursor and the ability to handle objects on your screen. It allows
navigation in an easy and convenient way.
A positive point of this hardware is that it works perfectly with any of the types of
computer that are on the market today. It is difficult to see any incompatibility
changing mouse/mouse, whatever the brand of a system to another.
The function main mouse, "mouse" is find or organize information with the
left hand side. The right side presents several options, such as copy, paste or
cut.
GOALS
Institutional

42. • The manual for the area of technical support of preventive maintenance of
PC´s is over 100%.
• That the manual will be implemented and works for the technical support
area.
• The personnel to perform their Social Service and practical professionals in
this area, using it and learn of preventative maintenance activities.
Staff´s
Acquire practical skills and develop theoretical knowledge, to perform any
diagnosis and detect faults in the teams both hardware or software giving
solution to the problems as soon as possible.
OBJECTIVES
General

43. Make a user manual, to serve as a reference to implement courses of preventive
maintenance of PCs, allowing training staff that requires theoretical - practical, way.
Specific
S Learn about the internal architecture of the computer hardware.
Differentiate the existing Hardware configurations.
Know and use the materials and tools used in the area of technical support for
the preventive maintenance
t Learn how to perform the preventive and corrective maintenance through a
methodological sequence to PC's.
• REQUIREMENTS FOR PREVENTIVE MAINTENANCE
• Machinery and equipment to incluide

44. 1) A set of screwdrivers (Philips) or cross-head, Hexagon socket or Torx,
flat and Copa del Rey).
2) A wrist strap.
3) A small soft brush.
4) Catton swab.
5) A blower or "blower.
6) Pieces of fabric dry.
7) A disk cleanup.
8) Isopropy Alcohol.
9) Clean spray contacts.
10) Silicone lubricant or White fat.
11) Oil-3 – IN - ONE.
12) A draft.
• Areas of operation to include
It is important to include in this guide many of the areas in which we can
carry out maintenance either in preventive and corrective of one machine
because in any occasion where there is a computer or computer
maintenance there this our work seen. In this case we have carried out
preventive maintenance of one of the maquias of the area of technical
support and help desk, in the interviews we can see all the areas we visited
to conduct maintenance or make such media named in these.
• Additional disciplines to the preventive mantenance program

45. As well as experience in the area of systems, there are other air which should
know because they used in the maintenance of computing.
The electronic management (electricity)
• Customer service
• Cleaning
• Mechanics
• Mathematics and some physical
PLANNING FOR THE IMPLENTATION OF THE
MAINMATENANCE(ORDER JOB)

46. Below are the procedures which had and should take into account when
making the maintenance of the Pc

47. Planning for the implementation of the maintenance
Procedure Time in
minutes
Working tools to disassemble the team get ready to go 2
Disconnect the wiring equipment (hardware) 3
Take the team and move it 25
seconds
Place the team's computer on a flat surface and secure 25
seconds
Determine the first tools used in disarmament 3
Unscrew the tower or pc is desensamblando 2
Remove the end covers 30
seconds
Place the pc in a proper way so it can be disassembled 20
seconds
Remove or disconnect the source of power of the main board, CD-ROM, hard 4
drive, Floppy drive
Destornillar the source of power 2
Remove it from the tower 30
seconds
Blow out the source of power, placing him an element to the fan to prevent 1
damage or to turn
Destornillar along with the heat sink fan if necessary. There are some 4
that are under pressure
Remove the heatsink of the mainboard, avoiding damage to the processor and2blow it with
the
sopladora(asegurar_el_ventilador_con_un_elemento_que_no_permita_las_revoluciones_de
el_ventilador)
Now to remove the processor if you want to. Remove the insurance that keeps 1
pressure
Remove the processor using latex gloves if necessary, if not you think it 2
appropriate to not remove the processor
Place the processor in a safe place in case an antistatic element 20
seconds
Remove video, internet RAM memories graphics cards 6
Unscrew the hard disk and CD-ROM drive 4
Remove units 1
Clean the elements removed from the pc as a hard drive, unit of CD - ROM - 7
floppy with a can of foamy unit and if it is necessary to use the blower.
Clean up as RAM - internet sound cards and others with a can of compressed 5
air or blower
Clean up the entire interior of the tower with a blower avoiding contact with the 5
powder

48. The average time of preventive maintenance in hardware is 1 hour or hour
and a half.
In this case our time was 1 hour 22 minutes 30 seconds.
MEASUREMENT OF PREVENTIVE MAINTENANCE
For the measurement of the preventive maintenance will seek a software as it is in
this case the software called performance, is intended to be the final outcome of
the test performance of 7%
PROCEDURE FOR PREVENTIVE MAINTENANCE OF SOFTWARE AND
HARDWARE
Preventive maintenance software
1- The defragmented disk desfragmentación addresses accommodate files in
ancient Memory addresses
2- applications installed on the computer and that no longer in use, removal of
temporary, missing files, empty folders, shortcuts that have a path that no
longer exists, invalid records for the purpose of free space on your hard disk
to increase the speed and correct the flaws in the normal functioning of
computers.
3- You can choose in the form of releasing disk space windows as the Liberator
search in the drive you have selected the temporary files, internet cache
files, and unnecessary files that can be removed safely.
• The execution of a virus which is carried out scanning of cleaning of the
computer in my pc or computer by right clicking and analysing with the
antivirus contains its OS Mantenimiento del Hardware (PC)
Maintain CPU (box of the computer) adequately ventilated and separated from
excessive sources of heat and humidity.
Check from time to time that fans of the CPU (source of food, safe, processor
and graphics card) are working properly and are free from dust, cleaning them
with care if necessary. An excessive or unusual sound can help us to prevent

49. a rapid failure of the fan.
• Do not move or hit the CPU while it is turned on. We must remember that the
que el disco disk hard is girado constantly, like the floppy drive or CD-ROM,
and can cause a failure of any of them. In the same way, carefully move the
CPU on the move, because we can disengage some cards or connection
internal.
Clean up every time the keyboard, mouse, printer, removing dust and stains,
according to the manufacturer's instructions.
The only connection that can connect and disconnect from a switched on PC is
the USB. For the rest, shut down always the computer and the peripheral
connect, making it turn then.
Used to be a current peaks filter, which protect us from overvoltages by
failures in the power supply. Such devices have aspect of "multiple space" and
they are relatively affordable.
During the installation of cards or components inside the CPU, be
careful, and insert them without force. Before you place them, touch the
metal parts to download possible static electricity of our body, which can
damage the components. Verify that the cables do not prevent proper
cooling of the fans
INVENTORY OF HARDWARE AND SOFTWARE (CHECK LISTINGS)Estos the
devices found were:
Inventory of hardware maintenance:
First computer
RAM: 2 GB of Kingston memories
MEMORY TYPE: DDR
VOLTAGE: 2.6
SIZE OF RAM CAPACITY: 256 MB
PROCESSOR: Intel Pentium 2.40ghz/1m/533 SL 88f pilipinas 75228303

50. ZOCKET: MPGA 478B
MAIN BOARD: Intel desk top board D845GVFN/D845 pemy
PCI: number 3 with wireless and PCI card in half
AGP: not available
HARD disk: maxtor size; 40 gb voltage; 12 and/or 5 reference; Nar61H90
KEYBOARD reference: 427004614 CMS marks; geniuses
REFERENCE MOUSE: netscroll
REFERENCE drive: serial; 96850433 js smt N50 marks; Sony model; MPF920
voltage; 5. 960 MA
REFERENCE DVD; (ROM): model; SOHC-5236V serial; 461519008805 voltage;
5 1.5A/12v 1.5A
Second Computing
RAM: 1 Kingston
MEMORY TYPE: DDR 400
VOLTAGE: 2.5
SIZE OF CAPACITY: 512 MB
PROCESSOR: Intel Pentium 519 k SL 8 ja philippines
3.06hz/1m/533/04a753b212
SOCKET: IFJ702
MAIN BOARD: as rock dual channel 77515g reference; fsb1066/esb800
PCI: 3 without a card number
AGP: if you have but no card
HARD drive: Hitachi size; 164 gb voltage; 5 490MA - 12V serial; z20po6ef
model; HDS721616 PLAT80

51. KEYBOARD reference: kb-0316 5v-50mA E-C012-03-Spain (B)
THE MOUSE reference: geniuses s/n 148655902046
REFERENCE drive: E-H012-03-0795 (B) 5V-960 mA Js hsm n50
REFERENCE DVD (ROM: model;) GSA-h42n serial; 701HBWB37345 5v/12v
1.5A/2.0A marks; LG
Third computing
RAM: 1 Kingston
MEMORY TYPE: DDR
VOLTAGE: 1.8
BUILDING SIZE: 2G
PROCESSOR: Intel 05E4600 Intel coreTM 2 Duo SL a94MALAY
2.40ghz/2m/8000gq812a22 SL 88f Philippines 75228303
SOCKET:
MAIN BOARD: as rock
PCI: 2 without a card number
AGP: If you have with-pin connector
HARD disk: maxtor size; 40 gb voltage; 12 and/or 5 reference; Nar61H90
KEYBOARD reference: geniuses model GK-070006/U YB 9811024703
REFERENCE mouse: genius GM-03022P s/N W60193701747
REFERENCE drive: Sony model; MPF920 voltage; 5. 960 mA
REFERENCE DVD; (ROM): model; SOHC-5236V serial; 461519008805 voltage;
5 1.5A/12v 1. 5th

52. Format for the recruitment and screening for the maintenance of hardware

53. RAM:
MEMORY TYPE
VOLTAGE:
CAPACITY SIZE:
PROCESSOR:
SOCKET:
MAIN BOARD:
PCI:
AGP:
HARD DRIVE:
REFERENCE KEY:
MOUSE REFERENCE:
FLOPPY DISK
REFERENCE:
REFERENCE DVD;(ROM):

54. Inventory of software maintenance
Maintenance of software as inventory is a total collection of programs (software)
containing the pc and general how by follows.
• Goes to the start button
• Control Panel
• Programs and Features
And you can see how the computer program contains in itself that will be the
general inventory
HOW TO MAKE A BACK-UP FOR FILES
every time you are going to carries out maintenance of some damage to software
or hardware that includes as such internal manipulation of the Tower hard drive is
very important to make a back up of the documents of the user which means that I
do a copy of the most important of the user documents so then both he and I do not
present disadvantages once the maintenance has been and is missing a file in
such a way this back up we can do in the following way:
I enter the start button
Look there for my PC when enter search the local hard drive option this saves the
information on your hard disk.

55. Double click and enter will receive a series of folders where you will find a folder as
such assigned to make back-up like this.
Da double click will appear the folders of the number of users who use this PC in
such a way that search for the folder that the user indicated.
To give double click will appear documents that you have on your computer are all
and selected giving them copy either a CD or a USB memory or in such manner on
other removable hard drive in this way will be saving the files that most interest you
to the user.
When you are finished and the maintenance of the computer again on the local
drive.
Then in the folder
Of which remove the folder of the user and finally in the final folder which is the
user where you got information either on the CD or the USB memory stick or
removable hard disk copiare where again the information there was user.
EQUIPMENT READINESS

56. Enlistment of equipment transfer and monitoring
Provided that it performs a preventive or corrective maintenance it is important that
we demarquemos the computer to review to avoid future problems.
To demarcate we use symbols, strike, or some kind of stamp as it is:
Technician Time Machine
name model
Board Date Procedure
computer was
performed
PROOF OF PERFORMANCE (PERFORMACE)
It will give rise to the following instructions
1- The software is in operation you will be given click to continue.

57. 2- It sought the option RUN BENCHMARK and will click immediately began to
analyze the performance of your computer
3- He observed the progress that has thes software on the análisis of the
measuremente of the maintenance.
Finally performance software to show the performance of your computer and if you
want to save this information only goes to save result.

58. In this case the performance is 401.0
DISARMAMENT and assembling of the equipment (images)
• Determine the most organized form of maintenance of equipment.
Keep the computer free of dust
Utiliza un paño suave
Keep the screen and the typing covered with covers or guards.
Order to detect the features that present the computer externally
Be complied with (a) in the management of safety standards
Organized (a) in place of work
Careful (a) in the handling of the tool
Cautious (a) in the disassembly of parts team
Neat in the cleaning of surfaces external/internal CPU
Creative in solving problems

59. Honest to assemble parts
Responsible for the delivery in good condition and in time the pc
Techniques of disassembly and Assembly of equipment of computer.
These basic measures are vital to the security of the computer equipment and
personal safety * before opening of any is necessary to check for to detect possible
failure, which is to turn on the computer and test each and every one of the
applicationsreview of floppy disk drives and the CD - ROM drive. * Verify that each
one of the keys of the keyboard work properly, both the mouse and the buttons to
move without any problem. * No forget to shut down the computer and disconnect
the power cord of the taking of power before removing the screws and take note of
the place where I remove them. * Remove the screws and to introduce them in the
pot for the photographic roll (thus avoiding losing the screws), be sure to use the
appropriate driver. * Remove the lid of the computer, if the PC is mini tower lie him
to work with comfort and security. * Prior to remove any component, look carefully
at the inner part of PC, take note of the placement of the cards, when preventive
maintenance is completed put them in the exact place where the bag. * Once taken
notes small details appropriate to place the antistatic wristband to avoid damaging
any card.
* When to remove the card and it is found cleaning place it in an antistatic bag, the
same for all cards. It is recommended to not remove the hard drive, microprocessor
and power source. * The work table to be located in a right place, to avoid the risk
of falling components removed from the Cabinet (cables, expansion cards, * an
adequate lighting is essential to see the areas to be cleaned)along with a better
identification of the components of the computer to avoid confusion at the time of
connect the different cables inside the system. Be cautious with the management of
the screws of the system in time to disarm it. The screws are not designed for all
points. It is very important to differentiate well those who are short of the medium
and long. For example, if a long screw is used to mount the hard drive, there is a
risk of damaging the card internal it is better to store screws in a single place,
others classify and others ordered them as it is disarming to then train them in
reverse order at the time to assemble the team.

60. PROOF OF PERFORMANCE END
And finally our final proof of performance demonstrating that our preventive
maintenance if it is right and we can have a better performance of the
machine
TERMS OF DELIVERY AND COST
All services offered in this manual have specific cost and monetary value
does not exceed $ 180,000 common.
All prices include VAT (Value Added Tax). If satisfied with the service, the
hardware parts are charged per order for postage and packing method of
payment is made between the parties concerned.
1. With credit card, the easiest option. We accept Visa, Castling, American

61. Express and Diners. You enter the card details and we charge the amount.
2. By bank transfer or check. Transfer money to our account or send a check
for the invoice value. The account number for transfer can be found in order
confirmation. If you choose to check, please use the address below. After
confirmation of payment for their part, we will send your computer
equipment.
If you have any questions regarding payment methods, you can contact us
at luis910509@hotmail.com. We will respond with pleasure.
WARRANTIES AND POLICIES
This warranty policy only covers the original installed parts that make up the
team (original model configuration).
Coverage of labor and work specified in the warranty document is subject to
the type and model of PC.
Coverage of original software is preloaded on hardware devices with more
than one year, the software system have a duration of 30 days from the date
of commencement of warranty period.
It is important that the customer has on hand a copy of the invoice
Have none of these documents will be requested the exact date computer
repair, as this is a prerequisite to apply for a share.
According to the models of each computer has, the warranty terms and
conditions described in the policy of product on the side of the document
signed by repairing your PC or laptop.
Processing of Warranty
Repaired equipment failure must submit the following procedure so that your
warranty will be served:
Through a toll-free customer must report the failure of his machine at No
3203032554.
A representative of the company's Technical Support will assist you and help
to detect the failure of your machine.
If your phone can not resolve the impasse, the representative shall assign a
case number and an authorized center.
Different models and it is concluded that there are different types of
warranty.
There are teams that according to your policy have the following warranty
period:
Hosts: count with 03 year warranty covering labor and parts as indicated by
your policy and attendance is close to the case.
Desktop computers - Tower: These are computers that have 01 years
warranty on labor.

62. The customer and the warranty of the battery are also 01 years.
Laptops as indicated by the policy have a warranty of 2 years of work and
part but becomes effective the client must take the equipment to Dealer
CONCLUSIONS
The opportunity to analyze a wide variety of equipment with different
problems has allowed a broader view of what is really to preventive
maintenance. This in turn has helped to gain new knowledge and enhance
knowledge to those who already had, has had the opportunity to clarify many
doubts that in theory were not always easy to understand, but in practice
they are much more understandable.
Whole mechanism is known in the implementation of software and
hardware maintenance.
The opportunity to implement what they have learned to acquire new
knowledge society of other preventive maintenance of an efficient support
for any technical problems.
Has allowed a broader view of what is really to preventive maintenance.

63. GLOSSARY
Computers are composed of a series of electronic components that are
responsible for proper operation. These include
• central processing unit (CPU) is the brain of the pc. Responsible for
processing instructions and data that the computer works. The processor is
the device most important and most influential in their speed in analyzing
information.
• RAM or main memory: the random access memory in which instructions
and data are stored programs for the CPU can access them directly through
the external data bus speed.
The RAM memory is known as read / write, to differentiate it from the ROM.
This means that in the RAM, the CPU can read and write. Therefore, most
programs use part of RAM as temporary space to store data, which allows
rewriting. As it does not retain its contents, turning the computer is important
to keep the information.
The amount of RAM enough influence on the speed of a PC. The more RAM
you have, the faster work and more programs can have open at once.
• Memory ROM: read-only memory. Is the main storage of the computer that
does not lose its contents when power is interrupted. It contains essential
system programs that neither the computer or the user can delete, such as
those that allow you to start running every time you turn on the computer.
• Hard disk: the secondary storage device that uses multiple hard drives
covered in a magnetically sensitive material. Is housed, along with the read
heads in a hermetically sealed mechanism, which are stored programs and
all files created by the user when working with these programs. The more
capacity you have a hard disk, information and programs can be stored on
the PC.
Hard disk capacity is measured in gigabytes (GB). One GB is equal to 1,024
megabytes (MB) about mind.
• Cache is a small unit superfast memory that stores information that
recently accessed or that is frequently accessed, thus preventing the
microprocessor will need to recover this information from slower memory
chips.
The cache is usually located on the motherboard, but sometimes it is
integrated into the processor module. Their data storage capacity measured
in kilobytes (KB). While the computer has more cache is better, because you
have more instructions and data in a faster memory.
• Motherboard: is the circuit board containing the processor or CPU, RAM,
chips support the microprocessor and expansion slots. These are for
inserting, for example, the sound card (which allows the pc playing sound),

64. the internal modem (which makes it possible to surf the internet) or graphics
or video (which can display images on the screen) .
• CD-ROM: This drive used to read compact discs, are these programs,
music or multimedia (sounds, images, text), such as encyclopedias and
games. The speed of this unit depends on two factors: the data transfer rate
and access time.
The data transfer rate refers to the amount of data to the CD - ROM can be
sent to PC in a second. This rate is measured in kilobytes per second (kbps)
and is indicated by a number next to an x, eg 16x, 24x or 48x. The more x,
the more speed.
The access time refers to how long it takes the entire process.
• CD: This drive reads and writes to CD's. These discs are used to store and
read information, but unlike the hard disk, which is fixed within the PC, you
can insert and remove the drive, so you can move data from one place to
another. The CDs have a data storage capacity very high.
The essential tools in the data input are called
Input Devices: Input devices incorporate the information into the system
drive of the pc.
Keyboard: is an input device consisting of a key system, such as a
typewriter, which allows the computer to enter data or digital device.
When you press a character, it sends a coded input to the computer, which
then displays the character on screen. The term numeric refers to the set of
keys with numbers on the right side of some keyboards.
The keys on computer keyboards are often classified as follows:
• Alphanumeric keys: letters and numbers.
• punctuation keys, comma, period, semicolon, among others.
• Special keys: function keys, control keys, arrow keys, shift key, among
others.
Mouse / Mouse: piece of hardware connects your computer to help control
the movements of the cursor and the ability to handle objects on your
screen. Navigation enables an easy and comfortable.
A bright spot of this hardware is that it works perfectly with either type of
computer on the market today. It is difficult to see any inconsistency
changing mouse / mouse, whatever the brand from one system to another.
The main function of the mouse, "mouse" is to find and organize information
on the left side. On the right side are several options such as copy, paste or
cut.

65. REFERENCES
• http://www.mailxmail.com/curso-mantenimiento-ordenadores/que-
sirvemantenimiento
•
http://www.cedecap.org.pe/uploads/biblioteca/archivos_grandes/Mantenimie
ntoPreventivoCorrectivoDePCs.pdf
•http://es.wikipedia.org/wiki/Mantenimiento_preventivo
•http://foros.rincondelvago.com/seguridad/mantenimiento-preventivo-y-
correctivo

66. •http://jonathanquinatoa.blogcindario.com/2010/07/00004-mantenimiento-
correctivo-de-computadoras.html
Corrective Maintenance of a Computer
•http://mx.answers.yahoo.com/question/index?
qid=20110112094435AA9MvE0
•http://jose123.securesites.net/tareasya/index.php?
option=com_content&view=article&id=5428:Mantenimiento-
preventivo&catid=902:Aprende-algo-% C3% Batil-today-Education% C3%
B3n-para- the-job & Itemid = 332
• http://articulosgratisenlinea.com/articulos/c% C3% B3mo-remove-one-
processor-de-la-computadora.html
• http://www.google.com/search?
um=1&hl=es&biw=1359&bih=582&tbm=isch&aq=f&aqi=g10&oq=&q=soplad
ora
• http://www.geeksxd.com/vb/tutoriales-boletines-ebooks/148-tips-de-
limpieza-del-monitor-y-limpieza-del-mouse.html
•http://es.wikipedia.org/wiki/DIMM • http://es.wikipedia.org/wiki/SIMM
•http://es.wikipedia.org/wiki/Double_Data_Rate
• http://www.repararpc.info/2009/10/herramientas-que-se-usan-al-reparar-
una.html
•http://es.answers.yahoo.com/question/index?
qid=20090511074406AAssGxA
•http://www.configurarequipos.com/doc327.html
• http://www.taringa.net/posts/ebooks-tutoriales/1821351/Como-limpiar-un-
cpu.html
•http://www.monografias.com/trabajos30/mantenimiento-
computador/mantenimiento-computador.shtml
•http://www.elwebmaster.com/articulos/como-limpiar-adecuadamente-el-
interior-de-tu-pc

67. _____________________________________________________
SYSTEMS TECHNICAL GROUP
2011