IBM ThinkCentre 8171 Parts list manual

ThinkCentre
™
Hardware Removal and Replacement
Guide
Ty pe s 8424, 8425, 8428
Ty pe s 8171, 8172, 8173


ThinkCentre
™
Hardware Removal and Replacement
Guide
Ty pe s 8424, 8425, 8428
Ty pe s 8171, 8172, 8173


Second Edition (June 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
Safety information . . . . . . . . . . . .v
Additional information resources . . . . . . .v
Tools required . . . . . . . . . . . . . .v
Handling static-sensitive devices . . . . . . .v
Replacing customer replaceable units
(CRUs) . . . . . . . . . . . . . . .1
Opening the cover . . . . . . . . . . . .1
Locating components . . . . . . . . . . .2
Identifying parts on the system board . . . . . .3
Removing and replacing the power supply . . . .3
Removing and replacing the system board assembly 7
Removing and replacing the microprocessor . . .10
Removing and replacing memory modules . . . .15
Removing and replacing a hard disk drive . . . .18
Completing the installation . . . . . . . . .19
Updating (flashing) BIOS from a diskette . . . .21
© Copyright IBM Corp. 2004 iii

iv Hardware Removal and Replacement Guide

Overview
This guide contains instructions for replacing the following customer replacement
units (CRUs):
v Power supply
v System board
v Microprocessor
v Hard disk drive
v Memory modules
Safety information
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.
Additional information resources
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 replace some CRUs in your computer, you might need a flat-blade or Phillips
screwdriver. Additional tools might be needed for certain CRUs.
Handling static-sensitive devices
Static electricity, although harmless to you, can seriously damage computer
components and CRUs.
When you are replacing a CRU, do not open the static-protective package
containing the new CRU until the defective CRU has been removed from the
computer and you are ready to install the new CRU.
When you handle CRUs 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 CRUs and other computer components carefully. Handle
adapters, memory modules, system boards, and microprocessors by the edges.
Never touch any exposed circuitry.
v Prevent others from touching the CRUs and other computer components.
© Copyright IBM Corp. 2004 v

v Before you replace a new CRU, touch the static-protective package containing
the CRU 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 new CRU from the static-protective packaging, and
install it directly in the computer without setting the CRU down. When this is
not possible, place the static-protective package that the CRU came in on a
smooth, level surface and place the CRU on it.
v Do not place the CRU 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 “Safety
notices” 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.
Opening the cover
Important
Turn off the computer and wait 3 to 5 minutes to let the computer cool
before opening the cover.
To open the cover:
1. Remove any media (diskettes, CDs, or tapes) from the drives, shut down your
operating system, and turn off all attached devices.
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 the floor stand, if attached.
5. If a cover lock is installed, unlock the cover.
6. Press inward on the two buttons and pivot the top cover upward as illustrated.
© Copyright IBM Corp. 2004 1

Locating components
The following illustration will help you locate the various components in your
computer.
1 Diskette drive lock 5 Power supply assembly
2 Memory modules 6 CD or DVD drive (hard disk drive is
under the CD drive)
3 Battery 7 CD or DVD drive lock
4 PCI riser
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.
The following illustration shows the locations of parts on the system board.
1 Fan connectors (2) 8 Diskette drive connector
2 Memory connectors (2) 9 Power button and front LED assembly
connector
3 SATA IDE hard disk drive
connectors (2)
10 Power supply connector
4 Riser connector 11 PATA Primary IDE connector (hard disk
drive and CD-ROM drive)
5 CMOS Battery 12 Power supply connector
6 Clear CMOS/BIOS recovery
jumper
13 Microprocessor
7 Internal speaker connector
Removing and replacing the power supply
Attention
Do not open your computer or attempt any repair before reading the “Safety
notices” 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, do the following:
1. Open the cover. Go to “Opening the cover” on page 1.
Replacing customer replaceable units (CRUs) 3

2. Pivot the drive bay assembly upward to gain access to the cable connections.
3. Locate the power supply. See “Locating components” on page 2.
Note: Note the routing of the power supply cables. It is important to route
the cables the same way when installing a new power supply assembly.
4. Disconnect the power cables from the hard disk drive and the CD-ROM drive.
5. Disconnect the power cables P1 1and P2 2 from the system board.
6. Disconnect the wire from the internal speaker connector on the system board.
See “Identifying parts on the system board” on page 3.
4 Hardware Removal and Replacement Guide

7. Remove the screws at the rear of the chassis that secure the power supply.
8. Slide the power supply forward and remove from the computer.
Replacing customer replaceable units (CRUs) 5

9. 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.
10. Install and tighten the four screws at the rear of the chassis that secure the
power supply.
11. Reconnect the speaker wire to the system board.
12. Reconnect power supply connectors to the system board.
13. Reconnect power supply connectors to the hard disk drive and CD-ROM
drive, as required.
14. Correctly route all power supply cables to avoid interference with the drive
bay assembly, and fold the ribbon cables 1 and 2along the existing crease
lines.
Attention
Keep cables 1 through 3 clear of the hinges and sides of the
computer chassis.
15. Close the cover and reconnect the external cables . Go to “Completing the
installation” on page 19.
6 Hardware Removal and Replacement Guide

Removing and replacing the system board assembly
Attention
Do not open your computer or attempt any repair before reading the “Safety
notices” 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 the computer to cool for one hour.
2. Open the cover. Go to “Opening the cover” on page 1.
3. Pivot the drive bay assembly upward to gain access to the system board.
4. While holding the rear of the computer chassis down, pull upward on the
handle provided to remove the PCI riser and any adapters that are currently
Replacing customer replaceable units (CRUs) 7

installed.
5. Carefully note the location of all cable connections on the system board. It will
be necessary to reconnect them properly after installing the new system board
assembly.
Note: Note the cable routing. It is important to route the cables the same way
when installing a new system board.
6. Disconnect the diskette drive cable from the system board by sliding the
plastic cable retainer upward to release the cable.
7. Disconnect all other cables connected to the system board. See “Identifying
parts on the system board” on page 3 to locate the cables.
8. Remove the power supply. Go to “Removing and replacing the power supply”
on page 3.
9. Remove the six screws that secure the system board to the chassis.
8 Hardware Removal and Replacement Guide

10. Using the two blue handles provided, lift the system board assembly out of
the computer.
11. Place the old system board next to the new system board on a clean, flat
surface.
12. Remove the microprocessor from the old system board. Go to “Removing and
replacing the microprocessor” on page 10. Return here after removing the
microprocessor.
13. Remove all memory modules from the old system board, and install them on
the new system board. Go to “Removing and replacing memory modules” on
page 15. Return here after installing the memory modules.
14. Install the new system board into the computer chassis by aligning the two
tabs on the rear of the system board with the slots in the rear of the computer
chassis. Slide the system board to the rear of the computer until the front edge
of the system board fits behind the flange in the front of the chassis and is
seated flush to the bottom of the chassis.
15. Install the six screws to secure the system board to the chassis.
Note: Use only the screws provided by IBM.
16. Reinstall the power supply. See “Removing and replacing the power supply”
on page 3.
17. Reconnect all cables that were disconnected from the system board. Make sure
all cables are routed correctly.
18. Reinstall the PCI riser and any adapters that are currently installed.
19. Lower the drive bay assembly into the original position.
20. Close the cover and reconnect the external cables . Go to “Completing the
installation” on page 19.
Replacing customer replaceable units (CRUs) 9

Removing and replacing the microprocessor
Attention
Do not open your computer or attempt any repair before reading the “Safety
notices” 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 use the new heat sink with the new microprocessor. If you
use the old heat sink with the new microprocessor, your computer might overheat
causing intermittent problems.
Important
Avoid handling the microprocessor with your hands, and avoid contact with
the microprocessor contacts. Use the vacuum pen provided 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 for one hour.
2. Open the cover. Go to “Opening the cover” on page 1.
3. Pivot the drive bay assembly upward to gain access to the microprocessor.
10 Hardware Removal and Replacement Guide

4. Release the lever 1holding the microprocessor heat sink.
5. Remove the heat sink, and do one of the following:
v If you are replacing the microprocessor, place the old heat sink aside. You
must use the new heat sink shipped with the new microprocessor.
Note
Do not use the old heat sink with the a new microprocessor. If you use
the old heat sink with the new microprocessor, your computer might
overheat causing intermittent problems.
v If you are replacing the system board, carefully 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 and become contaminated.
6. Release the lever 3holding the microprocessor retainer 1, and pivot the
retainer to the open position.
*XXXXXXXXX*
Replacing customer replaceable units (CRUs) 11

Notes:
a. Notice of the orientation of the notches 1 on the microprocessor . This is
important when reinstalling the microprocessor on the system board.
* XXXXXXXXX*
b. Do not drop anything on the socket while it is open. Keep all contacts as
clean as possible.
7. To install the microprocessor, do one of the following:
Attention
To avoid damaging the microprocessor pins, do not tilt the
microprocessor when installing it into the microprocessor socket.
Important
Do not touch the gold contacts on the bottom of the microprocessor. If
you must touch the microprocessor, touch only the sides.
v If you are installing a new microprocessor:
a. Remove the old microprocessor using the vacuum pen and place the
microprocessor aside.
12 Hardware Removal and Replacement Guide