Lenovo ThinkCentre A51p Parts list manual

ThinkCentre
™
Hardware Removal and Replacement
Guide
Ty pe s 8143, 8144, 8146
Ty pe s 8422, 8423, 8427


ThinkCentre
™
Hardware Removal and Replacement
Guide
Ty pe s 8143, 8144, 8146
Ty pe s 8422, 8423, 8427


First Edition (April 2004)
© Copyright International Business Machines Corporation 2004. All rights reserved.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Overview . . . . . . . . . . . . . .v
Information resources . . . . . . . . . . .v
Tools required . . . . . . . . . . . . . .v
Handling static-sensitive devices . . . . . . .v
Replacing customer replaceable units
(CRUs) . . . . . . . . . . . . . . .1
Removing the cover . . . . . . . . . . . .1
Locating components . . . . . . . . . . .2
Identifying parts on the system board . . . . . .3
Removing and replacing the power supply . . . .4
Removing and replacing the system board assembly 6
Removing and replacing the microprocessor . . . .9
Removing and replacing memory . . . . . . .15
Removing and Installing adapters . . . . . . .15
Removing and replacing a hard disk drive . . . .17
Connecting a parallel ATA hard disk drive . . .18
Connecting a serial ATA hard disk drive . . . .18
Completing the installation . . . . . . . . .18
© Copyright IBM Corp. 2004 iii

iv Hardware Removal and Replacement Guide

Overview
This manual contains instructions for removing and replacing the following
customer replacement units (CRUs):
v Power supply
v System board
v Microprocessor
v Hard disk drive
v Memory
Information resources
The Quick Reference that comes with your computer provides information for
setting up your computer, starting the operating system, troubleshooting, and
notices.
Access IBM provides a link to more information about your computer. Click Start →
Access IBM.
If you have Internet access, the most up-to-date manuals for your computer are
available from the World Wide Web. To access this information, point your browser
to:
http://www.ibm.com/pc/support
Type your machine type and model number in the Quick Path field, and click Go.
Tools required
To install some options in your computer, you might need a flat-blade or Phillips
screwdriver. Additional tools might be needed for certain options. See the
instructions that come with the option.
Handling static-sensitive devices
Static electricity, although harmless to you, can seriously damage computer
components and options.
When you add an option, do not open the static-protective package containing the
option until you are instructed to do so.
When you handle options and other computer components, take these precautions
to avoid static electricity damage:
v Limit your movement. Movement can cause static electricity to build up around
you.
v Always handle components carefully. Handle adapters and memory modules by
the edges. Never touch any exposed circuitry.
v Prevent others from touching components.
© Copyright IBM Corp. 2004 v

v When you install a new option, touch the static-protective package containing
the option to a metal expansion-slot cover or other unpainted metal surface on
the computer for at least two seconds. This reduces static electricity in the
package and your body.
v When possible, remove the option and install it directly in the computer without
setting the option down. When this is not possible, place the static-protective
package that the option came in on a smooth, level surface and place the option
on it.
v Do not place the option on the computer cover or other metal surface.
vi Hardware Removal and Replacement Guide

Replacing customer replaceable units (CRUs)
Attention
Do not open your computer or attempt any repair before reading the
“Important safety information” in the Quick Reference that was included with
your computer. If you no longer have this copy of the Quick Reference, you
can obtain one online from the IBM Web site at
http://www.ibm.com/pc/support.
Removing the cover
Important
Turn off the computer and wait 3 to 5 minutes to let the computer cool
before opening the cover.
To remove the cover:
1. Shut down your operating system, remove any media (diskettes, CDs, or tapes)
from the drives, and turn off all attached devices and the computer.
2. Unplug all power cords from electrical outlets.
3. Disconnect all cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer.
4. Remove any locking devices such as a padlock or Kensington lock that secure
the cover.
5. Press the cover-release button on the right side cover, slide the cover to the
rear, and lift off.
© Copyright IBM Corp. 2004 1

Locating components
The following illustration will help you locate the various components in your
computer.
1 DIMMs
2 Power supply
3 Hard disk drive
4 PCI slot
5 Optional PCI adapter
2 Hardware Removal and Replacement Guide

Identifying parts on the system board
The system board (sometimes called the planar or motherboard) is the main circuit
board in your computer. It provides basic computer functions and supports a
variety of devices that are IBM-installed or that you can install later.
The following illustration shows the locations of parts on the system board.
1 12V power connector 14 SATA 1 IDE connector (primary hard
drive)
2 Diskette drive connector 15 Cover presence switch connector
3 Speaker connector 16 Power supply connector
4 DIMM connector 4 17 PCI Express x1 slot
5 DIMM connector 3 18 PCI Express x16 graphics slot
6 DIMM connector 2 19 PCI slot
7 DIMM connector 1 20 PCI slot
8 Clear CMOS/Recovery jumper 21 Battery
9 Front Panel connector 22 Microprocessor
10 PATA IDE connector 23 Microprocessor fan connector
11 SATA 4 IDE connector 24 Microprocessor heat sink
12 SATA 3 IDE connector
13 SATA 2 IDE connector
Replacing customer replaceable units (CRUs) 3

Removing and replacing the power supply
Attention
Do not open your computer or attempt any repair before reading the
“Important safety information” in the Quick Reference that was included with
your computer. If you no longer have this copy of the Quick Reference, you
can obtain one online from the IBM Web site at
http://www.ibm.com/pc/support.
To remove and replace the power supply, you will need a flat-blade screwdriver.
1. Remove the cover. See “Removing the cover” on page 1.
2. Press the release lever and rotate the hard disk drive outward using the blue
handle 1 to allow access to the power supply cable connections.
Note: As you disconnect power supply cables, note the location of each
connector.
3. Disconnect the power supply cable connected to each of the drives.
4. Disconnect the power supply cables connected to the system board.
5. Remove the screws at the rear of the chassis that secure the power supply.
4 Hardware Removal and Replacement Guide

6. Press inward on the metal retainer and remove the power supply from the
computer.
7. Install the new power supply into the chassis so that the screw holes in the
power supply align with those in the chassis.
Note: Use only the screws provided by IBM.
8. Install and tighten the four screws at the rear of the chassis that secure the
power supply.
9. Reconnect the power supply connectors to the system board.
10. Reconnect the power supply connector to each of the drives.
11. Rotate the hard disk drive inward until it is latched into position.
12. Ensure that all components have been reassembled correctly and that no tools
or loose screws are left inside your computer.
13. To finish the installation, see “Completing the installation” on page 18.
Replacing customer replaceable units (CRUs) 5

Removing and replacing the system board assembly
Attention
Do not open your computer or attempt any repair before reading the
“Important safety information” in the Quick Reference that was included with
your computer. If you no longer have this copy of the Quick Reference, you
can obtain one online from the IBM Web site at
http://www.ibm.com/pc/support.
To remove and replace the system board assembly, do the following:
1. Turn off the computer and allow it to cool to for one hour.
2. Remove the cover. See “Removing the cover” on page 1.
3. Lay the computer on its side.
4. Carefully take note of the location of all cable connections on the system
board. It will be necessary to reconnect them properly when installing a new
system board assembly.
Note: Take note of the cable routing. It is important to route the cables the
same way when installing a new system board.
5. Disconnect all cables connected to the system board. See “Identifying parts on
the system board” on page 3 to locate cables.
6. Remove the air baffle by pressing on the tab and pulling the air baffle up.
6 Hardware Removal and Replacement Guide

7. Remove the screws 1 through 7, and remove the system board.
8. Place the old system board next to the new system board on a clean, flat
surface.
9. Remove the microprocessor from the old system board to the new system
board. See “Removing and replacing the microprocessor” on page 9. Return
here after installing the microprocessor.
10. Remove all adapter cards from the old system board. See “Removing and
Installing adapters” on page 15.
11. Remove all memory from the old system board to the new system board. See
“Removing and replacing memory” on page 15.
12. Install the new system board assembly into the computer chassis by aligning
the four slots on the metal plate on the bottom of the system board with the
Replacing customer replaceable units (CRUs) 7

tabs in the chassis.
Important
If the metal plate is not aligned correctly when you install the screws,
you might damage the system board.
13. Align the seven screw holes, and install the screws.
14. Install all adapter cards to the new system board. See “Removing and
Installing adapters” on page 15.
15. Install the air baffle by aligning the tabs to the holes in the chassis. Be sure to
route the cable through the notch on the side of the air baffle.
16. Reconnect all cables that were disconnected from the system board. Make sure
all cables are routed correctly. See “Identifying parts on the system board” on
page 3 for cable locations.
17. To finish the installation, see “Completing the installation” on page 18.
8 Hardware Removal and Replacement Guide

Removing and replacing the microprocessor
Attention
Do not open your computer or attempt any repair before reading the
“Important safety information” in the Quick Reference that was included with
your computer. If you no longer have this copy of the Quick Reference, you
can obtain one online from the IBM Web site at
http://www.ibm.com/pc/support.
Important
Shut down and turn off your computer for at least one hour before removing
the microprocessor to allow the thermal interface between the microprocessor
and the heat sink time to cool down.
When you receive a new microprocessor, you will also receive a new heat sink and
vacuum pen. You must replace the heat sink as well as the microprocessor. If you
use the old heat sink with the new microprocessor, your computer could overheat
and shut down sporadically.
Important
Avoid handling the microprocessor with your hands, and avoid contact with
the microprocessor contacts. Use the vacuum pen to remove and install the
microprocessor. If you must touch the microprocessor, touch only the sides.
To remove the microprocessor, do the following:
1. Turn off the computer and allow it to cool to for one hour.
2. Open the cover. See “Removing the cover” on page 1.
3. Lay the computer on its side.
4. Remove the air baffle by pressing on the tab and pulling the air baffle up.
5. Disconnect the fan cable from the system board. Note the cable location on the
system board.
Replacing customer replaceable units (CRUs) 9

6. Release the lever 1securing the microprocessor heat sink 2.
7. Remove the heat sink:
v If you are replacing the microprocessor with a new one, use the new heat
sink.
Note
If you use the old heat sink with the new microprocessor, your
computer could overheat and shut down sporadically.
v If you are not replacing the microprocessor, place the heat sink on its side
on a clean, flat surface so the thermal interface on the bottom of the heat
sink does not touch the surface.
10 Hardware Removal and Replacement Guide

8. Release the lever 2holding the microprocessor 1, and rotate the
microprocessor retainer 3 to the open position.
9. Do one of the following:
Attention
Do not the gold contacts on the bottom of the microprocessor. If you
must touch the microprocessor, touch only the sides.
v If you are replacing the microprocessor 2, loosen the black cover 3, but
do not remove it. Use the vacuum pen to pick up the new microprocessor
1, and remove the black cover that protects the contacts on the
Replacing customer replaceable units (CRUs) 11

microprocessor. Place the black cover on the old microprocessor.
* XXXXXXXXX*
v If you are installing a microprocessor from the old system board to a new
system board, use the vacuum pen 1 to pick up the microprocessor.
12 Hardware Removal and Replacement Guide