Lenovo ThinkCentre M55 User Manual

Hard ware Replacement Gui de Ty pe s 8012, 8794, 8798, 8802 Ty pe s 8806, 8811, 8816

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 1 Power supply diagnostic LEDs 9 Serial connector (COM 2) (some models) 2

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

5. Press the cover-release button on the right side cover, slide the cover to the rear, and remove. 6. When the hard disk

Removing the hard disk drive mounting bracket The hard disk drive mounting bracket can easily be removed to provide better access t

Removing and replacing the front bezel Use this procedure only when it is necessary to remove the bezel to provide access to a CR

4. Remove the power supply cables from the cable clips and ties. 5. Remove the four screws that secure the power supply at

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

5. Remove any PCI adapter cards. See “Replacing an adapter” on page 24. 6. Carefully note the cable routing. It is important

12. Make sure that the heat sink is cool enough to handle safely. 13. Release and pivot lever 1 upward. Remove the heat si

Important Touch only the sides of the microprocessor. Do not touch the gold contacts on the bottom.15. Lift the microprocessor str

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

This section provides instructions on how to replace the microprocessor. Important Leave your computer turned off for at least one

4. Make sure that the heat sink is cool enough to handle safely. 5. Release and pivot lever 1 upward. Remove the heat sin

Important Touch only the sides of the microprocessor. Do not touch the gold contacts on the bottom. 7. Lift the microprocessor st

9. Holding the microprocessor with your fingers, remove the protective cover 2 that protects the gold contacts on the new micro

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

Hard ware Replacement Gui de Ty pe s 8012, 8794, 8798, 8802 Ty pe s 8806, 8811, 8816

14. 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

5. At the rear of the computer, pivot the blue adapter latch 1 to the closed position to secure the adapters. 6. Go to

5. 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. Release the optical disk drive by pressing on the blue retainer lever at the side of the drive and removing it from the fr

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

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

4. The system fan assembly is made up of two pieces: an air baffle and the system fan. Remove the air baffle by squeezing the

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

First Edition (July 2006) © Copyright Lenovo 2006. Portions © Copyright International Business Machines Corporation 2005, 2006. All rig

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

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

5. Slide the speaker 1 upward until it is free from the metal tabs that secure it at the bottom. Then pivot the bottom of

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

Updating (flashing) BIOS from a diskette or CD-ROM Important Start the Setup Utility program to view your system information. See “

Appendix. Notices Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your

vary significantly. Some measurements may have been made on development-level systems and there is no guarantee that these measuremen

Part Number: 41X6261 Printed in USA (1P) P/N: 41X6261

Contents Overview . . . . . . . . . . . . . .v Safety information for customers . . . . . . .v Safety information for ser

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

v Support phone listTo access this information, go to http://www.lenovo.com/think/support. Tools required To replace some parts in yo

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