HP Compaq nc8430 Manuel

Maintenance and Service

Guide

HP Compaq nw8440 Notebook PC

HP Compaq nc8430 Notebook PC

HP Compaq nx8420 Notebook PC

Document Part Number: 417790-001

June 2006

This guide is a troubleshooting reference used for maintaining

and servicing the computer. It provides comprehensive

information on identifying computer features, components, and

spare parts; troubleshooting computer problems; and performing

computer disassembly procedures.

Microsoft and Windows are U.S. registered trademarks of Microsoft

Corporation. Intel and Core are trademarks or registered trademarks of

Intel Corporation or its subsidiaries in the United States and other

countries. Bluetooth is a trademark owned by its proprietor and used by

Hewlett-Packard Company under license. SD Logo is a trademark of its

proprietor. Java is a trademark of Sun Microsystems Inc.

The information contained herein is subject to change without notice. The

only warranties for HP products and services are set forth in the express

warranty statements accompanying such products and services. Nothing

herein should be construed as constituting an additional warranty. HP shall

not be liable for technical or editorial errors or omissions contained herein.

Maintenance and Service Guide

HP Compaq nw8440 Notebook PC

HP Compaq nc8430 Notebook PC

HP Compaq nx8420 Notebook PC

First Edition: June 2006

Document Part Number: 417790-001

Maintenance and Service Guide iii

Contents

1 Product Description

1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

1.2 Resetting the Computer. . . . . . . . . . . . . . . . . . . . . . . 1–4

1.3 Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . 1–5

1.4 External Components . . . . . . . . . . . . . . . . . . . . . . . . 1–6

1.5 Design Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 1–20

2 Troubleshooting

2.1 Computer Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1

Using Computer Setup . . . . . . . . . . . . . . . . . . . . . . . 2–1

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

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

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

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

2.2 Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . 2–5

iv Maintenance and Service Guide

Contents

3 Illustrated Parts Catalog

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

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

3.3 Plastics Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–16

3.4 Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . 3–18

3.5 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 3–20

3.6 Sequential Part Number Listing . . . . . . . . . . . . . . . 3–22

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 . . . . . . . . . 4–5

4.6 Workstation Precautions . . . . . . . . . . . . . . . . . . . . . . 4–6

4.7 Grounding Equipment and Methods . . . . . . . . . . . . . 4–7

Contents

Maintenance and Service Guide v

5 Removal and Replacement Procedures

5.1 Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2

5.2 Disassembly Sequence Chart . . . . . . . . . . . . . . . . . . 5–3

5.3 Preparing the Computer for Disassembly . . . . . . . . . 5–5

5.4 Hard Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6

5.5 Computer Feet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10

5.6 Optical Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–11

5.7 External Memory Module . . . . . . . . . . . . . . . . . . . . 5–13

5.8 Bluetooth Module . . . . . . . . . . . . . . . . . . . . . . . . . . 5–16

5.9 Keyboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–18

5.10 Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23

5.11 Heat Sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28

5.12 Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–31

5.13 Internal Memory Module . . . . . . . . . . . . . . . . . . . 5–33

5.14 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–35

5.15 TouchPad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–36

5.16 Mini Card Module. . . . . . . . . . . . . . . . . . . . . . . . . 5–39

5.17 Switch Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–42

5.18 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5–45

5.19 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–49

5.20 Modem Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–53

5.21 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–55

5.22 System Board Frame. . . . . . . . . . . . . . . . . . . . . . . 5–62

5.23 Serial Connector Module . . . . . . . . . . . . . . . . . . . 5–65

5.24 USB/Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . 5–67

vi Maintenance and Service Guide

Contents

6 Specifications

A Screw Listing

B Software Backup and Recovery

C Display Component Recycling

D Connector Pin Assignments

E Power Cord Set Requirements

Index

Maintenance and Service Guide 1–1

Product Description

The HP Compaq nw8440 Notebook PC, HP Compaq nc8430

Notebook PC, and HP Compaq nx8420 Notebook PC offer

advanced modularity, Intel® Core™ Duo processors, and

extensive multimedia support.

HP Compaq nw8440 Notebook PC, HP Compaq nc8430

Notebook PC, and HP Compaq nx8420 Notebook PC

1–2 Maintenance and Service Guide

Product Description

1.1 Features

■The following processors, varying by computer model:

❏Intel Core Duo T2600 (2.17-GHz)

❏Intel Core Duo T2500 (2.00-GHz)

❏Intel Core Duo T2400 (1.83-GHz)

❏Intel Core Duo T2300 (1.66-GHz)

■The following displays are available, varying by

computer model:

❏15.4-inch, WUXGA, TFT (1920 × 1200) with over

16.8 million colors with AntiGlare

❏15.4-inch, WSXGA, TFT (1680 × 1050) with over

16.8 million colors with AntiGlare

❏15.4-inch, WXGA+, TFT (1440 × 900) with over

16.8 million colors with AntiGlare

■120-, 100-, 80-, and 60-GB high-capacity hard drive, varying

by computer model

■256-MB DDR2 synchronous DRAM (SDRAM) at 533 MHz

and 667 MHz, expandable to 4.0 GB

■Microsoft® Windows® XP Professional

■Full-size Windows keyboard with numeric keypad

■TouchPad and pointing stick pointing devices, including a

dedicated vertical scroll region (select models only)

■Integrated 10 Base-T/100 Base-TX Ethernet local area

network (LAN) network interface card (NIC) with RJ-45 jack

■Integrated high-speed 56K modem with RJ-11 jack

Product Description

Maintenance and Service Guide 1–3

■Integrated wireless support for Mini Card IEEE 802.11a/b/g

or 802.11b/g Wireless LAN (WLAN) device

■Support for one Type I or Type II PC Card slot, with support

for both 32-bit (CardBus) and 16-bit PC Cards, varying by

computer model

■External 90-watt AC adapter with 3-wire power cord

■8-cell Li-Ion battery

■Stereo speakers

■Volume up, volume mute, and volume down buttons

■Support for the following optical drives:

❏DVD±RW and CD-RW Double-Layer Combo Drive

❏DVD/CD-RW Combo Drive

❏DVD-ROM drive

■Connectors:

❏Accessory battery

❏Audio-in (microphone)

❏Audio-out (headphone)

❏Digital media slot

❏Docking connector

❏External monitor

❏IEEE 1394

❏RJ-11 (modem)

❏RJ-45 (network)

❏S-Video-out

❏Smart Adapter power

❏Three Universal Serial Bus (USB) v. 2.0

1–4 Maintenance and Service Guide

Product Description

1.2 Resetting the Computer

If the computer you are servicing has an unknown password,

follow the steps below to reset the password. These steps also

clear CMOS.

✎The following steps will not clear an unknown password if the

stringent security option has been enabled in the BIOS. If

stringent security is enabled, the system board must be replaced

to reset an unknown password. Refer to Section 5.23, “Serial

Connector Module,” for more information on replacing the

system board.

Before replacing the system board, perform the steps below to

make sure stringent security has been properly enabled.

Enabling stringent security provides enhanced protection for the

power-on password and administrator password and other forms

of power-on authorization. Stringent security is enabled/disabled

by accessing the Password Options menu in the Computer Setup

utility. Refer to Section 2.1, “Computer Setup,” for more

information.

1. Prepare the computer for disassembly (refer to Section 5.3,

“Preparing the Computer for Disassembly,” for more

information). Remove the real-time clock (RTC) battery

(refer to Section 5.14, “RTC Battery,” for more information

on removing and replacing the RTC battery).

2. Wait approximately 5 minutes.

3. Replace the RTC battery and reassemble the computer.

4. Connect AC power to the computer. Do not reinsert any

batteries at this time.

5. Turn on the computer.

All passwords and all CMOS settings have been cleared.

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