HP Compaq tc4400 Manual

Maintenance and Service

Guide

HP Compaq tc4400 Tablet PC

Document Part Number: 383208-002

May 2006

This guide is a troubleshooting reference used for maintaining

and servicing the tablet PC. It provides comprehensive

information on identifying tablet PC features, components, and

spare parts; troubleshooting tablet PC problems; and performing

tablet PC disassembly procedures.

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

Corporation. Intel, Celeron, 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.

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 tc4400 Tablet PC

Second Edition: May 2006

First Edition: March 2005

Document Part Number: 383208-002

Maintenance and Service Guide iii

Contents

1 Product Description

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

1.2 Resetting the Tablet PC. . . . . . . . . . . . . . . . . . . . . . . 1–4

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

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

1.5 Design Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 1–22

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 Diagnostics Menu. . . . . . . . . . . . 2–4

Selecting from the System Configuration Menu. . . . 2–5

2.2 Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . 2–6

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–11

3.4 Cable Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12

3.5 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 3–13

3.6 Sequential Part Number Listing . . . . . . . . . . . . . . . 3–15

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 Tablet PC for Disassembly . . . . . . . . . 5–5

5.4 Hard Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7

5.5 Tablet PC Feet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–11

5.6 Bluetooth Module . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12

5.7 External Memory Module . . . . . . . . . . . . . . . . . . . . 5–14

5.8 Keyboard Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17

5.9 Keyboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–20

5.10 Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24

5.11 Heat Sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–25

5.12 Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28

5.13 Internal Memory Module . . . . . . . . . . . . . . . . . . . 5–30

5.14 Mini Card WLAN Module . . . . . . . . . . . . . . . . . . 5–32

5.15 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5–34

5.16 Button Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–40

5.17 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–43

5.18 TouchPad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–47

5.19 Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–51

5.20 Infrared Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–53

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

5.22 Modem Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–60

5.23 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–62

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 tc4400 Tablet PC offers advanced modularity,

Intel® Core™ Duo and Celeron® M processors, and extensive

multimedia support.

HP Compaq tc4400 Tablet PC

1–2 Maintenance and Service Guide

Product Description

1.1 Features

■Intel Core Duo T2600 (2.17-GHz), T2500 (2.00-GHz),

T2400 (1.83-GHz), and T2300 (1.67-GHz) or Intel

Celeron M 1.60-GHz processors, varying by tablet PC model

■12.1-inch, XGA, TFT (1024 × 768) display with over

16.8 million colors

■100-, 80-, or 60-GB high-capacity hard drive, varying by

tablet PC model

■256-MB DDR2 synchronous DRAM (SDRAM) at 633 MHz

and 533 MHz, expandable to 4.0 GB

■Microsoft® Windows® XP Tablet Edition

■Full-size Windows keyboard with embedded numeric keypad

■TouchPad and pointing stick pointing devices, including a

dedicated vertical scroll region

■Integrated 10Base-T/100Base-T/1000Base-T Ethernet local

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

jack

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

■Integrated wireless support for Mini PCI IEEE 802.11b/g and

802.11a/b/g 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

Product Description

Maintenance and Service Guide 1–3

■External 65-watt AC adapter with 3-wire power cord

■6-cell Li-Ion battery pack

■Audio speaker

■Volume up, volume mute, and volume down buttons

■Connectors:

❏Infrared

❏Audio-out (headphone)

❏Audio-in (microphone)

❏Universal Serial Bus (USB) v. 2.0 (3 ports, 1 powered)

❏Power

❏External monitor

❏RJ-45 (network)

❏RJ-11 (modem)

❏S-Video-out

❏PC Card

❏Digital Media Slot

❏Primary battery pack

❏Travel battery pack

❏Docking connector

1–4 Maintenance and Service Guide

Product Description

1.2 Resetting the Tablet PC

If the tablet PC you are servicing has an unknown password,

follow the steps below to clear 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 5.21, “System

Board,” 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 prtotection 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 tablet PC for disassembly (refer to Section 5.3,

“Preparing the Tablet PC for Disassembly,” for more

information).

2. Remove the real-time clock (RTC) battery (refer to

Section 5.23, “RTC Battery,” for more information on

removing and replacing the RTC battery).

3. Wait approximately 5 minutes.

4. Replace the RTC battery and reassemble the tablet PC.

5. Connect AC power to the tablet PC. Do not reinsert any

batteries at this time.

6. Turn on the tablet PC.

All passwords and all CMOS settings have been cleared.

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