IBM THINKCENTRE 8123 user manual

User manual for the device IBM THINKCENTRE 8123

Device: IBM THINKCENTRE 8123
Category: Computer Hardware
Manufacturer: IBM
Size: 1.75 MB
Added : 10/30/2014
Number of pages: 44
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Abstracts of contents
Summary of the content on the page No. 1


ThinkCentre 
Hardware Replacement Guide
Types 8122, 8123, 8124
Types 8131, 8137, 8138


Summary of the content on the page No. 2

Summary of the content on the page No. 3

™ ThinkCentre  Hardware Replacement Guide Types 8122, 8123, 8124 Types 8131, 8137, 8138

Summary of the content on the page No. 4

First Edition (April 2005) © Copyright International Business Machines Corporation 2005. All rights reserved. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

Summary of the content on the page No. 5

Contents Removing and replacing the front bezel . . . . .8 Overview . . . . . . . . . . . . . .v Replacing the power supply . . . . . . . . .8 Safety information for replacing CRUs . . . . . .v Replacing the system board assembly . . . . . .12 Safety information for replacing FRUs . . . . . .v Replacing the microprocessor . . . . . . . .19 Additional information resources . . . . . . .v Replacing a memory module . . . . . . . .25 Tools required . . . . . . . . . . . . .vi Rep

Summary of the content on the page No. 6

iv Hardware Replacement Guide

Summary of the content on the page No. 7

Overview This guide is intended to be used by customers who are replacing Customer Replaceable Units (CRUs) as well as trained service personnel who are replacing Field Replaceable Units (FRUs). In this guide CRUs and FRUs will often be referred to as parts. This guide does not include procedures for all parts. It is expected that cables, switches, and certain mechanical parts can be replaced by trained service personnel without the need for step-by-step procedures. Note: Use only the

Summary of the content on the page No. 8

Tools required To replace some parts in your computer, you will need a flat-blade or Phillips screwdriver. Additional tools might be needed for certain parts. Handling static-sensitive devices Static electricity, although harmless to you, can seriously damage computer components. When you are replacing a part, do not open the static-protective package containing the new part until the defective part has been removed from the computer and you are ready to install the new part. When you

Summary of the content on the page No. 9

Chapter 1. Locations This chapter provides illustrations to help locate the various connectors, controls and components of the computer. To remove the computer cover, see “Removing the computer cover” on page 5. Locating components The following illustration will help you locate the various components in your computer. 1 Optical drive 6 System board 2 Memory modules 7 Lower drive cage (diskette drive and hard disk drive) 3 Power supply 8 Internal speaker 4 PCI a

Summary of the content on the page No. 10

Locating controls and connectors on the front of the computer This section shows the various external connectors on the computer to which you can attach external devices. 1 3 9 4 1 IEEE 1394 connector (some 4 Microphone connector models) 2 USB connector 5 Headphone connector 3 USB connector 2 Hardware Replacement Guide

Summary of the content on the page No. 11

Locating connectors on the rear of the computer The following illustration shows the location of connectors on the rear of the computer. 1 Power supply diagnostic 11 Ethernet connector LEDs 2 Voltage selection switch 12 USB connectors (2) 3 Power connector 13 Standard keyboard connector 4 Audio line in connector 14 Standard mouse connector 5 Audio line out connector 15 PCI Express x16 adapter connector (some models) 6 Microphone connector 16 PCI adapter

Summary of the content on the page No. 12

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 Internal speaker connector 12 PCI adapter connector 2 Memory connector 4 13 PCI adapter connector 3 Memory connector 3 14 Serial connector (COM 2) 4 Memory connector 2 15 P

Summary of the content on the page No. 13

Chapter 2. Replacing hardware Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information” in the Quick Reference that was included with your computer or in the Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick Reference or HMM, go to http://www.ibm.com/pc/support. Note: Use only the parts provided by IBM. Removing the computer cover Important Turn off the computer and wait 3 to 5 minutes

Summary of the content on the page No. 14

6. Some models have an optional hard disk drive mounting bracket 1 installed. When this bracket is installed, access to some of the CRUs or FRUs inside the chassis is restricted. Note: There appears to be two drive bays in the bracket. However, due to thermal restrictions, only the bay 2 at the rear of the chassis can be used to install a hard disk drive. See “Pivoting or removing the optional hard disk drive mounting bracket” on page 7. To replace the computer cover, see “Co

Summary of the content on the page No. 15

Pivoting or removing the optional hard disk drive mounting bracket The optional hard disk drive mounting bracket can easily be pivoted upward or removed if necessary to enable replacement of some CRUs and FRUs. To pivot the optional hard disk drive bracket upward, pull outward at the bottom of the bracket. Note: You might have to disconnect the cables attached to the optional hard disk drive. If it is necessary to remove the optional hard disk drive mounting bracket, disconnect the

Summary of the content on the page No. 16

Removing and replacing the front bezel 1. Remove the computer cover. See “Removing the computer cover” on page 5. 2. To release the front bezel from the chassis, press downward on the two plastic tabs 1 and push the bezel outward as shown. 3. To reinstall the bezel, align the plastic tabs 1 on the bottom of the bezel with the corresponding holes in the chassis, then snap it into position at the bottom and top of the chassis. 4. Go to “Completing the installation” on page

Summary of the content on the page No. 17

2. To access the 12 V power connector, remove the lower drive cage thumb-screw and slide the lower drive cage toward the rear and out of the bay. Place the drive cage out of your way without disconnecting the drive signal cables. 3. Disconnect the power supply cables 1 and 2 from the system board. 4. Disconnect the power cable from each of the drives. Note the location of each cable that is disconnected. Chapter 2. Replacing hardware 9

Summary of the content on the page No. 18

5. Remove the four screws that secure the power supply at the rear of the chassis. 6. Press inward on the metal retainer inside the chassis and slide the power supply toward the front of the chassis and lift it out of the chassis as shown. 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 with the new power supply. 8. Install and tighten the four screws tha

Summary of the content on the page No. 19

9. Reconnect power supply connectors 1 and 2 to the system board. 10. Reinstall the lower drive cage and secure it with the thumb-screw. 11. Reconnect a power supply connector to each of the drives. 12. Go to “Completing the installation” on page 33. Chapter 2. Replacing hardware 11

Summary of the content on the page No. 20

Replacing the system board assembly Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information” in the Quick Reference that was included with your computer or in the Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick Reference or HMM, go to http://www.ibm.com/pc/support. 1. Turn off the computer and allow it to cool for one hour. 2. Remove the computer cover. See “Removing the computer cov


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