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ThinkCentre™Hard ware Replacement Guid e Ty pe s 8122, 8123, 8124 Ty pe s 8131, 8137, 8138 

Locating controls and connectors on the front of the computer This section shows the various external connectors on the computer to

Locating connectors on the rear of the computer The following illustration shows the location of connectors on the rear of the comp

Identifying parts on the system board The system board (sometimes called the planar or motherboard) is the main circuit board in yo

Chapter 2. Replacing hardware Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety

6. Some models have an optional hard disk drive mounting bracket 1 installed. When this bracket is installed, access to some o

Pivoting or removing the optional hard disk drive mounting bracket The optional hard disk drive mounting bracket can easily be pivo

Removing and replacing the front bezel 1. Remove the computer cover. See “Removing the computer cover” on page 5. 2. To release

2. To access the 12 V power connector, remove the lower drive cage thumb-screw and slide the lower drive cage toward the rear

5. Remove the four screws that secure the power supply at the rear of the chassis. 6. Press inward on the metal retainer

9. Reconnect power supply connectors 1 and 2 to the system board. 10. Reinstall the lower drive cage and secure it with

Replacing the system board assembly Attention: Do not remove the computer cover or attempt any repair before reading the “Important

6. Remove the lower drive cage by removing the thumb-screw and sliding the lower drive cage toward the rear of the computer.

13. Release and pivot lever 1 upward. Remove the heat sink 2 from the system board by carefully lifting it up and off the

15. Using the vacuum pen1, remove the microprocessor from the system board socket by lifting it straight up and out of the so

16. On the new system board, release and pivot the locking lever, then pivot the microprocessor retainer until it is open. Note:

19. Pivot the microprocessor retainer 3 to the closed position and rotate the locking lever 2 to secure the microprocessor 1

21. Install the new system board assembly into the computer chassis by aligning the four slots in the metal plate on the bottom

Replacing the microprocessor Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety i

2. Remove the air baffle by squeezing the tabs 1 together and pulling it out of the chassis. 3. Release and pivot lever

4. Release and pivot locking lever 2 securing the microprocessor 1, then pivot the microprocessor retainer 3 until it is op

ThinkCentre™Hard ware Replacement Guid e Ty pe s 8122, 8123, 8124 Ty pe s 8131, 8137, 8138 

Notes: a. Notice of the orientation of the notches 1 on the microprocessor. This is important when reinstalling the microprocess

Important To avoid damaging the microprocessor contacts, do not tilt the microprocessor when installing it into the socket. 9. Usin

11. Align the beveled corners of the new heat sink and the mounting bracket. Then position the heat sink 2 on the heat sink

Replacing a memory module Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety inf

Replacing an adapter Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety informati

Replacing the hard disk drive Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety

6. To install the new hard disk drive into the blue bracket, flex the bracket and align the pins 1 through 4on the bracket

3. Disconnect the signal and power cables from the rear of the optical drive. 4. Release the optical disk drive by pressing o

Replacing the diskette drive Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety

1. Remove any media (diskettes, CDs, or tapes) from the drives, shut down the computer, and turn off all attached devices. 2.

First Edition (April 2005) © Copyright International Business Machines Corporation 2005. All rights reserved. US Government Users Restr

1. Remove the computer cover. See “Removing the computer cover” on page 5. Note: For this procedure, it helps to lay the comput

Completing the installation After replacing a failed part, you need to install any other removed parts, install the computer cover,

5. Reconnect the external cables. Plug the power cord into the computer then into a properly grounded power receptacle. See “Loca

Part Number: 39J7784 Printed in USA (1P) P/N: 39J7784

Contents Overview . . . . . . . . . . . . . .v Safety information for replacing CRUs . . . . . .v Safety information for r

iv Hardware Replacement Guide

Overview This guide is intended to be used by customers who are replacing Customer Replaceable Units (CRUs) as well as trained serv

Tools required To replace some parts in your computer, you will need a flat-blade or Phillips screwdriver. Additional tools might be

Chapter 1. Locations This chapter provides illustrations to help locate the various connectors, controls and components of the compute