HP Compaq tc4400 Manual

t
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.

© Copyright 2006 Hewlett-Packard Development Company, L.P.
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
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.

Product Description
Maintenance and Service Guide 1–5
1.3 Power Management
The tablet PC comes with power management features that
extend battery pack operating time and conserve power. The
tablet PC supports the following power management features:
■Standby
■Hibernation
■Setting customization by the user
■Hotkeys for setting the level of performance
■Battery calibration
■Lid switch resume
■Power button
■Advanced Configuration and Power Management (ACPM)
compliance

1–6 Maintenance and Service Guide
Product Description
1.4 External Components
The external components on the front of the tablet PC are shown
below and described in Table 1-1.
Front Components
Table 1-1
Front Components
Item Component Function
1 Wireless light On: An integrated wireless device, such as
a wireless local area network (WLAN)
device and/or Bluetooth® device is turned
on.
2Powerlight ■On: The computer is on.
■Blinking green: The computer is in
standby.
■Blinking rapidly: An HP Smart AC
Adapter with a higher power rating
should be connected.
■Off: The computer is off or in hibernation.

Product Description
Maintenance and Service Guide 1–7
3Batterylight ■Amber: A battery pack is charging.
■Green: A battery pack is close to full
charge capacity.
■Blinking amber: A battery pack that is the
only available power source has reached
a low-battery condition. When the battery
pack reaches a critical low-battery
condition, the battery light begins
blinking more quickly.
■Off: If the computer is connected to
an external power source, the light
is turned off when all batteries in the
computer are fully charged. If the
computer is not connected to an external
power source, the light is turned off until
the battery pack reaches a low-battery
condition, when the light begins blinking
amber.
4Drivelight ■Blinking green: The hard drive or optical
drive is being accessed.
■Amber: HP Mobile Data Protection has
temporarily parked the hard drive.
5 Infrared port Provides wireless communication between
the computer and an optional
IrDA-compliant device.
6 Display release button Opens the tablet PC.
7 Fingerprint reader Allows a fingerprint logon to Windows
instead of using a password.
Table 1-1
Front Components
(Continued)
Item Component Function

1–8 Maintenance and Service Guide
Product Description
The external components on the right side of the tablet PC are
shown below and described in Table 1-2.
Right-Side Components

Product Description
Maintenance and Service Guide 1–9
Table 1-2
Right-Side Components
Item Component Function
1Audio-out
(headphone) jack
Produces computer sound when connected
to optional power stereo speakers,
headphones, ear buds, a headset, or
television audio.
2 Audio-in (microphone)
jack
Connects an optional computer headset
microphone, stereo array microphone, or
monoarual microphone.
3 Powered USB port Connects USB 1.1- or 2.0-compliant
devices to the tablet PC using a standard
USB cable, or connects an optional external
MultiBay or external MultiBay II to the
tablet PC. This USB port is a powered port
that can be used without external power.
4 PC Card slot or
optional smart card
reader
✎On select tablet PC models, the PC
Card slot may be replaced with an
optional smart card reader.
If your tablet PC has
■a PC Card slot, it supports optional
Type I, Type II, 32-bit (CardBus), or
16-bit PC Cards.
■a smart card reader, it accepts smart
cards or Java™ Cards.
5 Digital Media Slot Supports Secure Digital (SD) Memory
Cards and MultiMediaCards (MMC).

1–10 Maintenance and Service Guide
Product Description
The external components on the left side of the tablet PC are
shown below and described in Table 1-3.
Left-Side Components
Table 1-3
Left-Side Components
Item Component Function
1 Security cable slot Attaches an optional security cable to the
tablet PC.
✎The purpose of security solutions is
to act as deterrents. These
deterrents may not prevent a product
from being mishandled or stolen.
2 Vent Provides airflow to cool internal
components.
ÄTo prevent overheating, do not
obstruct vents. Use the computer
only a hard, flat surface. Do not allow
a hard surface, such as an adjoining
printer, or a soft surface, such as
pillows or thick rugs or clothing, to
block airflow.
✎Depending on the tablet PC model,
vents vary in number and location.

Product Description
Maintenance and Service Guide 1–11
3 Wireless button Turns the wireless functionality of the
WLAN or Bluetooth device on or off, but
does not establish a connection.
✎To establish a wireless connection,
a wireless network must already be
set up.
4 USB port Connects a USB 1.1- and 2.0-compliant
device to the tablet PC using a standard
USB cable.
5 Info Center button Launches Info Center, which enables you
to open various software solutions.
6 Power switch When the tablet PC is
■Off, slide toward the front of the
tablet PC and release to turn on the
tablet PC.
■In standby, slide toward the front of the
tablet PC and release to exit standby.
■In hibernation, slide toward the front of
the tablet PC and release to exit
hibernation.
If the tablet PC has stopped responding
and Microsoft Windows shutdown
procedures cannot be used, slide toward
the front of the tablet PC and hold for
4 seconds to turn off the tablet PC.
7 Speaker Enables you to listen to music and hear
audio alerts and signals from programs.
Table 1-3
Left-Side Components
(Continued)
Item Component Function

1–12 Maintenance and Service Guide
Product Description
The external components on the rear panel of the tablet PC are
shown below and described in Table 1-4.
Rear Panel Components

Product Description
Maintenance and Service Guide 1–13
Table 1-4
Rear Panel Components
Item Component Function
1 USB port Connects USB 1.1- and 2.0-compliant
devices to the tablet PC using a standard
USB cable.
2 RJ-11 (modem) jack Connects a modem cable. Enabled with
56-K connectivity.
3 RJ-45 (network) jack Connects a network cable. Enabled with
10BASE-T/100BASE-TX/1000BASE-T
connectivity.
4 Smart adapter power
connector
Connects an AC adapter, an optional
AC adapter, or an optional power cable.
5 External monitor port Connects an optional VGA external monitor
or projector.
6 S-Video-out jack Is a 7-pin, dual-purpose jack.
It connects an optional S-Video device,
such as a television, VCR, camcorder,
overhead projector, or video capture card,
with an optional, standard (4-pin) S-Video
cable.
The extra 3 pins also enable an optional
S-Video-to-composite adapter to be used
with the tablet PC.

1–14 Maintenance and Service Guide
Product Description
The standard keyboard components of the tablet PC are shown
below and described in Table 1-5.
Standard Keyboard Components