Maintenance and Service
Guide
HP Compaq tc4200 Tablet PC
Document Part Number: 440232-001
October 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.
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1 Product Description
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
2 Troubleshooting
Accessing Computer Setup . . . . . . . . . . . . . . . . . . . . 2–2
Selecting from the File Menu . . . . . . . . . . . . . . . . . . 2–3
2.2 Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . 2–7
3 Software Update and Recovery
Downloading a BIOS Update . . . . . . . . . . . . . . . . . . 3–3
Installing a BIOS Update . . . . . . . . . . . . . . . . . . . . . 3–4
Recovering the BIOS . . . . . . . . . . . . . . . . . . . . . . . . 3–5
Maintenance and Service Guide
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Contents
4.1 Serial Number Location . . . . . . . . . . . . . . . . . . . . . . 4–1
4.3 Miscellaneous Plastics/
Plastic Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . 5–2
5.3 Preventing Damage to Removable Drives . . . . . . . . 5–3
5.4 Preventing Electrostatic Damage . . . . . . . . . . . . . . . 5–4
5.5 Packaging and Transporting Precautions . . . . . . . . . 5–5
5.6 Workstation Precautions . . . . . . . . . . . . . . . . . . . . . . 5–6
5.7 Grounding Equipment and Methods. . . . . . . . . . . . . 5–7
iv
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6.18 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–44
6.19 TouchPad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–48
6.20 Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–52
6.21 Infrared Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–54
6.22 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–56
6.23 Modem Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–59
6.24 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–61
Maintenance and Service Guide
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Contents
7 Specifications
A Connector Pin Assignments
B Screw Listing
C Power Cord Set Requirements
Index
vi
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Product Description
1.1 Features
■
Intel Pentium M 2.13-, 2.00-, 1.86-, 1.73-, or 1.60-GHz
processors, or Intel Celeron M 1.50-GHz processor, varying
by tablet PC model
■
■
■
12.1-inch, XGA, TFT (1024 × 768) display with over
16.8 million colors
80-, 60-, or 40-GB high-capacity hard drive, varying by
tablet PC model
256-MB DDR2 synchronous DRAM (SDRAM) at 400 MHz,
expandable to 2.0 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
1–2
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Product Description
■
■
■
■
■
External 65-watt AC adapter with 3-wire power cord
6-cell Li-Ion battery pack, varying by tablet PC model
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
❏ SD Card
❏ Primary battery
❏ Travel battery
❏ Docking connector
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Product Description
1.2 Resetting the Tablet PC
follow these steps to clear the password. These steps also
clear CMOS:
1. Prepare the tablet PC for disassembly (refer to Section 6.3,
“Preparing the Tablet PC for Disassembly,” for more
information).
2. Remove the real-time clock (RTC) battery (refer to
Section 6.24, “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
battery packs at this time.
6. Turn on the tablet PC.
All passwords and all CMOS settings have been cleared.
1–4
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Product Description
1.3 Power Management
The tablet PC comes with power management features that
extend battery 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 standby/resume
Power/standby button
Advanced Configuration and Power Management (ACPM)
compliance
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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: One or more optional internal wireless
devices, such as a WLAN device and/or
Bluetooth® device, are turned on.
2
Power/standby light
■ Green: The tablet PC is on.
■ Blinking green: The tablet PC is
in standby mode.
1–6
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Product Description
Table 1-1
Front Components (Continued)
Item
Component
Function
3
Battery light
■ 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
reaches a critical low-battery condition,
the battery light begins blinking more
quickly.
■ Off: If the tablet PC is connected to
an external power source, the light
is turned off when all batteries in the
tablet PC are fully charged. If the
tablet PC is not connected to an external
power source, the light is turned off until
the battery reaches a low-battery
condition, when the light begins blinking
amber.
4
Integrated Drive
Electronics (IDE) drive
light
On: A drive in the hard drive bay is being
accessed.
5
6
7
Fast IrDA
(select models only)
Links the tablet PC to an optional remote
control.
Bluetooth module
(select models only)
Sends and receives Bluetooth device
signals.
Display release button
Opens the tablet PC.
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Product Description
Table 1-2
Right-Side Components
Function
Item
Component
1
Audio-out
Connects an optional headphone or
(headphone) jack
powered stereo speakers. Also connects
the audio function of an audio/video device,
such as a television or VCR.
2
3
Audio-in (microphone)
jack
Connects an optional monaural (single
sound channel) or stereo (dual sound
channel) microphone.
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
5
6
PC Card slot eject
button
Ejects PC Cards from the PC Card slot.
PC Card slot
Supports optional Type I, Type II, 32-bit
(CardBus), or 16-bit PC Cards.
SD Card slot
Accepts SD (Secure Digital) Memory Cards
or MultiMediaCards.
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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
Enables airflow to cool internal
components.
To prevent overheating, do not
Ä
obstruct vents. Using the tablet PC
on a soft surface, such as a pillow,
blanket, rug, or thick clothing, may
block airflow.
1–10
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Product Description
Table 1-3
Left-Side Components (Continued)
Item Component
Function
3
Wireless button
(select models only)
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
6
Info Center button
Power switch
Enables you to view a list of commonly
used software solutions.
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.
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Product Description
Table 1-4
Rear Panel Components
Function
Item Component
1
USB port
Connects USB 1.1- and 2.0-compliant
devices to the tablet PC using a standard
USB cable.
2
3
4
5
6
RJ-11 (modem) jack
RJ-45 (network) jack
Power connector
Connects a modem cable. Enabled with
56K connectivity.
Connects a network cable. Enabled with
10/100/1000BaseT connectivity.
Connects an AC adapter, an optional
AC adapter, or an optional power cable.
External monitor port
S-Video-out jack
Connects an optional VGA external monitor
or projector.
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.
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Product Description
Table 1-5
Standard Keyboard Components
Item
Component
Function
1
Function keys (12)
Perform system and application tasks.
When combined with the fn key, the
function keys f3, f4, and f8 through f11
perform additional tasks as hotkeys.
2
3
caps lock key
fn key
Enables caps lock and turns on the caps
lock light.
Executes frequently used system
functions when pressed in combination
with a function key or the esc key.
4
5
Windows logo key
Displays the Microsoft Windows
Start menu.
Windows
applications key
Displays a shortcut menu for items
beneath the pointer.
6
7
Arrow keys
Moves the cursor around the screen.
Embedded numeric
keypad
Can be used like an external numeric
keypad.
8
num lock key
Enables numeric lock, turns on the
embedded numeric keypad, and turns
on the num lock light.
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Product Description
Table 1-6
Top Components
Function
Item
Component
1
Left and right
TouchPad buttons (2)
Function like the left and right buttons on
an external mouse.
2
3
TouchPad
Moves the pointer. Can be set to perform
other mouse functions, such as scrolling,
selecting, and double-clicking.
Left and right pointing
stick buttons (2)
Function like the left and right buttons on
an external mouse.
4
5
Pointing stick
Vent
Moves the pointer.
Enables airflow to cool internal
components.
To prevent overheating, do
Ä
not obstruct vents. Using the
tablet PC on a soft surface, such
as a pillow, blanket, rug, or thick
clothing, may block airflow.
6
Presentation Mode
button
Turns on Presentation mode.
7
Volume mute button
Volume down button
Volume up button
Mutes or restores volume.
Decreases tablet PC sound.
Increases tablet PC sound.
Scrolls upward or downward.
8
9
10
TouchPad scroll zone
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Product Description
Table 1-7
Display Components
Component Function
Item
1
2
Internal microphone
Records sound.
Tablet PC Input Panel
Launch button
Opens the Microsoft Tablet PC Input Panel
application, which includes a handwriting
pad and an on-screen keyboard.
3
Rotate button
Switches the image between landscape
and portrait orientation.
4
5
Q button
Opens or closes the Q Menu.
When pressed while:
Windows Security
button
■ Windows is open, enters the
ctrl+alt+delete command.
■ The Setup utility is open, enters the
reset command.
6
Jog dial
Functions like the enter and the up and
down arrow keys on a standard keyboard.
■ Press inward to enter a command.
■ Rotate upward to scroll upward.
■ Rotate downward to scroll downward.
7
8
Pen eject button
Pen holder
Ejects the pen from the pen holder.
Secures the pen to the tablet PC.
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Product Description
Table 1-8
Bottom Components
Function
Item
Component
1
2
Base enclosure cover
Docking connector
Covers the display cable connector.
Connects the tablet PC to an optional
docking device.
3
4
Travel battery connector
Vents (3)
Connects an optional travel battery.
Enable airflow to cool internal
components.
To prevent overheating, do
Ä
not obstruct vents. Using the
tablet PC on a soft surface, such
as a pillow, blanket, rug, or thick
clothing, may block airflow.
5
6
Primary battery bay
Holds the primary battery pack.
Primary battery release
latch
Releases the primary battery pack from
the battery bay.
7
8
Hard drive cover
Holds the primary hard drive.
Expansion memory
module compartment
Contains one expansion memory
module slot.
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Product Description
1.5 Design Overview
This section presents a design overview of key parts and features
of the tablet PC. Refer to Chapter 4, “Illustrated Parts Catalog,”
to identify replacement parts, and Chapter 6, “Removal and
Replacement Procedures,” for disassembly steps.
The system board provides the following device connections:
■
■
■
■
■
■
■
■
■
■
■
Audio
Display
Hard drive
Intel Pentium M and Celeron M processors
Keyboard
Memory module
Mini PCI communications devices
PC Card
Pointing stick
TouchPad
Trusted platform module (TPM) security module
ÄCAUTION: To properly ventilate the tablet PC, allow at least a 7.6-cm
(3-inch) clearance on the left and right sides of the tablet PC.
The tablet PC uses an electric fan for ventilation. The fan is
controlled by a temperature sensor and is designed to be turned
on automatically when high temperature conditions exist. These
conditions are affected by high external temperatures, system
power consumption, power management/battery conservation
configurations, battery fast charging, and software applications.
Exhaust air is displaced through the ventilation grill located on
the left side of the tablet PC.
1–22
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2
Troubleshooting
WARNING: Only authorized technicians trained by HP should repair
this equipment. All troubleshooting and repair procedures are detailed
to allow only subassembly-/module-level repair. Because of the
complexity of the individual boards and subassemblies, do not attempt
to make repairs at the component level or modifications to any printed
wiring board. Improper repairs can create a safety hazard. Any
indication of component replacement or printed wiring board
modification may void any warranty or exchange allowances.
Å
2.1 Computer Setup
Computer Setup is a preinstalled, ROM-based utility that can be
used even when the operating system is not working or will not
load. If the operating system is working, the tablet PC restarts the
operating system after you exit Computer Setup.
Pointing devices are not supported in Computer Setup; you
must use the keyboard to navigate and make selections.
✎
The menu tables later in this chapter provide an overview of
Computer Setup options.
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Troubleshooting
Accessing Computer Setup
The information and settings in Computer Setup are accessed
from the File, Security, Tools, and Advanced menus.
1. Open Computer Setup by turning on or restarting the
tablet PC. Press f10 while the F10 = Based Setup message is
displayed in the lower-left corner of the screen.
❏ To change the language, press f2.
❏ To view navigation information, press f1.
❏ To return to the Computer Setup menu, press esc.
2. Select the File, Security, Tools, or Advanced menu.
3. To exit Computer Setup, choose one of the following:
❏ To exit without saving any changes, use the arrow keys to
select File > Ignore changes and exit, and then follow
the instructions on the screen.
❏ To exit and save all the settings you have entered, use the
arrow keys to select File > Save changes and exit, and
then follow the instructions on the screen.
Your preferences are set when you exit Computer Setup and take
effect when the tablet PC restarts.
Restoring Computer Setup Defaults
To return all settings in Computer Setup to the values that were
set at the factory:
1. Open Computer Setup by turning on or restarting the
tablet PC. Press f10 while the F10 = Based Setup message is
displayed in the lower-left corner of the screen.
❏ To change the language, press f2.
❏ To view navigation information, press f1.
2. Use the arrow keys to select File > Restore defaults.
3. Select the Restore Defaults check box.
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Troubleshooting
4. To confirm the restoration, press f10.
5. Select File > Save changes and exit, and then follow the
instructions on the screen.
When the computer restarts, the factory settings are restored, and
any identification information you have entered is saved.
Selecting from the File Menu
Table 2-1
File Menu
Select
To Do This
System Information
■ View identification information about the
tablet PC and any battery packs in the system.
■ View specification information about the
processor, memory and cache size, video
revision, keyboard controller version, and
system ROM.
Save to floppy
Save system configuration settings to a diskette.
Restore from floppy
Restore system configuration settings from a
diskette.
Restore defaults
Replace configuration settings in Computer Setup
with factory default settings. (Identification
information is retained.)
Ignore changes and exit
Save changes and exit
Cancel changes entered during the current
session. Then exit and restart the tablet PC.
Save changes entered during the current session.
Then exit and restart the tablet PC. The changes
you save are in effect when the tablet PC restarts.
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Troubleshooting
Selecting from the Security Menu
Table 2-2
Security Menu
Select
To Do This
Administrator password
Enter, change, or delete an HP Administrator
password.
Power-on password
Password options
Enter, change, or delete a power-on password.
■ Enable/Disable stringent security.
■ Enable/Disable required password on restart.
DriveLock passwords
Enable/disable DriveLock; change a DriveLock
user or master password.
DriveLock Settings are accessible only
✎
when you enter Computer Setup by turning
on (not restarting) the tablet PC.
Smart Card Security
Embedded Security
Enable/disable power-on support for smart cards.
This feature is supported by select smart
card readers only.
✎
■ Enable/Disable the embedded security chip.
■ Restore embedded security chip to factory
settings.
■ Enable/Disable power-on authentication
support.
■ Enable/Disable automatic DriveLock.
■ Reset power-on authentication credential
Embedded Security settings are accessible
✎
only if the tablet PC is equipped with an
embedded security chip.
Device security
System IDs
Enable/Disable devices in the system.
Enable NIC for inclusion in MultiBoot.
Enter user-defined identification values.
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Troubleshooting
Selecting from the Tools Menu
Table 2-3
Tools Menu
Select
To Do This
HDD Self Test options
Run a quick or comprehensive self-test on any
hard drive in the system.
Battery Information
Memory Check
View information about any battery packs in the
tablet PC.
■ Run a self-test on memory modules in the
tablet PC.
■ View information about memory modules
installed in the tablet PC.
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Troubleshooting
Selecting from the Advanced Menu
Table 2-4
Advanced Menu
Select
To Do This
Language (or press f2)
Boot options
Change the Computer Setup language.
■ Enable/Disable MultiBoot, which sets a startup
sequence that can include most bootable
devices and media in the system.
■ Set the boot order.
Device options
■ Swap the functions of the fn key and left
ctrl key.
■ Enable/Disable multiple pointing devices at
startup. (To set the tablet PC to support only a
single, usually nonstandard, pointing device at
startup, select Disable.)
■ Enable/Disable USB legacy support for a USB
keyboard, mouse, and hub. When USB legacy
support is enabled
❐ A USB keyboard, mouse, and hub work
even when a Windows operating system
is not loaded.
❐ The tablet PC starts from a bootable hard
drive, diskette drive diskette, or CD,
CD-RW, or DVD inserted into a drive
connected by a USB connector to the
tablet PC or to an optional docking
device.
■ Select a parallel port mode: EPP (Enhanced
Parallel Port), standard, bidirectional, or ECP
(Enhanced Capabilities Port).
■ Enable/Disable all settings in the SpeedStep
window. (When Disable is selected, the
tablet PC runs in Battery Optimized mode.)
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Troubleshooting
2.2 Troubleshooting Flowcharts
Table 2-5
Flowchart Description
2.1
2.2
“Flowchart 2.2—No Power, Part 1”
2.3
“Flowchart 2.3—No Power, Part 2”
2.4
“Flowchart 2.4—No Power, Part 3”
2.5
“Flowchart 2.5—No Power, Part 4”
2.6
“Flowchart 2.6—No Video, Part 1”
2.7
“Flowchart 2.7—No Video, Part 2”
2.8
“Flowchart 2.9—No Operating System (OS) Loading”
“Flowchart 2.10—No OS Loading, Hard Drive, Part 1”
“Flowchart 2.11—No OS Loading, Hard Drive, Part 2”
“Flowchart 2.12—No OS Loading, Hard Drive, Part 3”
“Flowchart 2.13—No OS Loading, Diskette Drive”
2.9
2.10
2.11
2.12
2.13
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Troubleshooting
Table 2-5
Flowchart Description
2.14
2.15
2.16
2.17
2.18
2.19
2.20
“Flowchart 2.14—No OS Loading, Optical Drive”
“Flowchart 2.15—No Audio, Part 1”
“Flowchart 2.16—No Audio, Part 2”
“Flowchart 2.17—Nonfunctioning Device”
“Flowchart 2.18—Nonfunctioning Keyboard”
“Flowchart 2.19—Nonfunctioning Pointing Device”
“Flowchart 2.20—No Network/Modem Connection”
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Troubleshooting
Flowchart 2.1—Initial Troubleshooting
Begin
troubleshooting.
N
Go to
Is there
power?
“Flowchart
2.2—No Power,
Part 1.”
Y
N
N
N
N
Check
LED board,
speaker
Beeps,
LEDs, or error
messages?
connections.
Go to
Y
Y
Y
Y
All drives
working?
“Flowchart 2.17—
Nonfunctioning
Device.”
Y
Y
Y
Go to
“Flowchart
2.6—No Video,
Part 1.”
Is there video?
(no boot)
Go to
“Flowchart
2.18—Nonfunc-
tioning Keyboard”
or “Flowchart
2.19—Nonfunc-
tioning Pointing
Device.”
Keyboard/
pointing
device
working?
Go to
“Flowchart
2.9—NoOperating
System (OS)
Loading.”
Is the OS
loading?
Go to
“Flowchart
2.20—No
Network/Modem
Connection.”
Connecting
to network
or modem?
Go to
“Flowchart
2.15—No Audio,
Part 1.”
Is there
sound?
End
Maintenance and Service Guide
2–9
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Troubleshooting
Flowchart 2.2—No Power, Part 1
No power
(power LED
is off).
Remove from
docking device
(if applicable).
N
N
N
Go to
“Flowchart
2.3—No Power,
Part 2.”
Power up
on battery
power?
Power up
on battery
power?
Reset
power.*
Y
Y
N
Y
Y
N
Y
Go to
“Flowchart
2.4—No Power,
Part 3.”
Power up
on AC
Power up
on AC power?
Reset
power.*
power?
Power up in
docking
device?
Done
*NOTES
1. On select models, there is a separate
reset button.
reset using the standby switch and
switch.
1. Reseat the power cables in the docking
device and at the AC outlet.
2. Ensure the AC power source is active.
3. Ensure that the power strip is working.
Y
N
Go to
Power up
in docking
device?
“Flowchart
Done
2.8—Nonfunctioning
Docking Device (if
applicable).”
2–10
Maintenance and Service Guide
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Troubleshooting
Flowchart 2.3—No Power, Part 2
Continued from
“Flowchart
2.2—No Power,
Part 1.”
Visually check for
debris in battery
socket and clean
if necessary.
Y
Power on?
Done
N
Check battery by
recharging it,
moving it to
another tablet PC,
or replacing it.
N
Replace
power supply
(if applicable).
Power on?
Y
N
Go to
“Flowchart
2.4—No Power,
Part 3.”
Done
Power on?
Y
Done
Maintenance and Service Guide
2–11
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Troubleshooting
Flowchart 2.4—No Power, Part 3
Continued from
“Flowchart
2.3—No Power,
Part 2.”
Plug directly
into AC outlet.
Y
Power LED
Done
on?
N
Reseat AC adapter
in tablet PC and
at power source.
Y
Power on?
Done
N
Y
External
Internal or
external AC
adapter?
N
Y
Replace external
AC adapter.
Try different
outlet.
Power outlet
active?
Internal
N
Y
Go to
“Flowchart
2.5—No Power,
Part 4.”
Power on?
Done
Replace
power cord.
Power on?
Done
N
2–12
Maintenance and Service Guide
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Troubleshooting
Flowchart 2.5—No Power, Part 4
Continued from
“Flowchart
2.4—No Power,
Part 3.”
Open
tablet PC.
Y
Reseat loose
Loose or
damaged
parts?
components and
boards and
replace damaged
items.
N
Close
tablet PC and
retest.
N
Replace the following items (if applicable). Check
tablet PC operation after each replacement:
1. Internal DC-DC converter*
2. Internal AC adapter
Power on?
Y
3. Processor board*
4. System board*
*NOTE: Replace these items as a set to prevent
shorting out among components.
Done
Maintenance and Service Guide
2–13
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