Lenovo ThinkCentre A51p Parts list manual

ThinkCentre
™
Hardware Removal and Replacement
Guide
Ty pe s 8141, 8142, 8145
Ty pe s 8420, 8421, 8426
ThinkCentre


ThinkCentre
™
Hardware Removal and Replacement
Guide
Ty pe s 8141, 8142, 8145
Ty pe s 8420, 8421, 8426


First Edition (May 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
Removing and replacing the power supply . . . .2
Removing and replacing the system board . . . .4
Removing and replacing the microprocessor . . . .7
Removing and replacing the hard disk drive . . .12
Connecting a serial ATA hard disk drive . . . .13
Connecting a parallel ATA hard disk drive . . .13
Removing and replacing memory . . . . . . .13
Removing and replacing a PCI adapter . . . . .15
Completing the CRU replacement . . . . . . .16
© 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 Memory
v Hard disk drive
Information resources
The Quick Reference that comes with your computer provides information for
installing your computer and starting the operating system. It also includes basic
troubleshooting information, software recovery procedures, help and service
information, and warranty information.
Access IBM, on your desktop, provides a link to more information about your
computer.
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 your computer and wait 3 to 5 minutes to let the computer cool
before removing 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.
© Copyright IBM Corp. 2004 1

4. Press the buttons on the sides of the computer and pivot the rear end of the
cover up toward the front of the computer.
ThinkCentre
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.
This section provides instructions on how to remove and replace the power supply.
1. Remove the cover. See “Removing the cover” on page 1.
2 Hardware Removal and Replacement Guide