Service Manual Compaq Evo n400c Series.pdf

Maintenance and Service Guide

Compaq Evo Notebook N400c Series

Document Part Number: 268629-002

August 2003

This guide is a troubleshooting reference used for maintaining

and servicing the notebook. It provides comprehensive

information on identifying notebook features, components, and

spare parts, troubleshooting notebook problems, and performing

notebook disassembly procedures.

Compaq, Evo, and the Compaq logo are trademarks of Compaq Information

Technologies Group, L.P.

Microsoft and Windows are trademarks of Microsoft Corporation.

Intel and Pentium are trademarks of Intel Corporation.

All other product names mentioned herein may be trademarks of their respective

companies.

Compaq shall not be liable for technical or editorial errors or omissions

contained herein. The information in this document is provided “as is” without

warranty of any kind and is subject to change without notice. The warranties

for Compaq products are set forth in the express limited warranty statements

accompanying such products. Nothing herein should be construed as

constituting an additional warranty.

Maintenance and Service Guide

Second Edition (August 2003)

Document Part Number: 268629-002

Contents

1 Product Description

1.1 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–12

1.3 Clearing a Password . . . . . . . . . . . . . . . . . . . . . . . . . 1–13

1.4 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . 1–14

1.5 Computer External Components . . . . . . . . . . . . . . . 1–15

1.6 Design Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–27

2 Troubleshooting

2.1 Computer Setup and

Diagnostics Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1

Selecting Computer Setup or

Compaq Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . 2–1

Selecting from the File Menu . . . . . . . . . . . . . . . . . . 2–3

Selecting from the Security Menu . . . . . . . . . . . . . . . 2–4

Selecting from the Advanced Menu . . . . . . . . . . . . . 2–5

2.2 Using Compaq Diagnostics . . . . . . . . . . . . . . . . . . . . 2–7

Obtaining, Saving, or Printing

Configuration Information. . . . . . . . . . . . . . . . . . . . . 2–7

Obtaining, Saving, or Printing Diagnostic

Test Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8

2.3 Troubleshooting Flowcharts. . . . . . . . . . . . . . . . . . . 2–10

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Contents

3 Illustrated Parts Catalog

3.1 Serial Number Location . . . . . . . . . . . . . . . . . . . . . . . 3–1

3.2 Computer System Major Components . . . . . . . . . . . . 3–2

3.3 Miscellaneous Plastics Kit Components . . . . . . . . . 3–10

3.4 Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . 3–12

3.5 Miscellaneous Spare Parts . . . . . . . . . . . . . . . . . . . . 3–14

4 Removal and Replacement Preliminaries

4.1 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1

4.2 Service Considerations. . . . . . . . . . . . . . . . . . . . . . . . 4–2

Plastic Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . 4–2

4.3 Preventing Damage to Removable Drives . . . . . . . . . 4–3

4.4 Preventing Electrostatic Damage . . . . . . . . . . . . . . . . 4–4

4.5 Packaging and Transporting Precautions . . . . . . . . . . 4–4

4.6 Workstation Precautions . . . . . . . . . . . . . . . . . . . . . . 4–5

4.7 Grounding Equipment and Methods . . . . . . . . . . . . . 4–6

5 Removal and Replacement Procedures

5.1 Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1

5.2 Disassembly Sequence Chart . . . . . . . . . . . . . . . . . . . 5–2

5.3 Preparing the Notebook for Disassembly . . . . . . . . . 5–3

5.4 Computer Feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5

5.5 Palm Rest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6

5.6 Memory Expansion Board . . . . . . . . . . . . . . . . . . . . 5–13

5.7 Hard Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17

5.8 Mini PCI Communications Board . . . . . . . . . . . . . . 5–19

5.9 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–21

5.10 Real Time Clock (RTC) Battery . . . . . . . . . . . . . . 5–25

5.11 Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–26

5.12 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28

5.13 Modem Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–31

5.14 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–36

Maintenance and Service Guide

Contents

6 Specifications

A Connector Pin Assignments

B Power Cord Set Requirements

3-Conductor Power Cord Set . . . . . . . . . . . . . . . . . . . . . . B–1

General Requirements . . . . . . . . . . . . . . . . . . . . . . . . B–1

Country-Specific Requirements . . . . . . . . . . . . . . . . . . . . B–2

C Screw Listing

Index

Maintenance and Service Guide

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