In a continuing effort to improve the quality of our products, technical and environmental information
in this document is subject to change without notice.
This manual and any examples contained herein are provided “as is” and are subject to change without
notice. Hewlett-Packard Company makes no warranty of any kind with regard to this manual,
including, but not limited to, the implied warranties of merchantability and fitness for a particular
purpose. Hewlett-Packard Co. shall not be liable for any errors or for incidental or consequential
damages in connection with the furnishing, performance, or use of this manual or the examples herein.
Consumer transactions in Australia and the United Kingdom: The above disclaimers and limitations
shall not apply to Consumer transactions in Australia and the United Kingdom and shall not affect the
statutory rights of Consumers.
The programs that control this product are copyrighted and all rights are reserved. Reproduction,
adaptation, or translation of those programs without prior written permission of Hewlett-Packard Co.
is also prohibited.
Portions of the programs that control this product may also be copyrighted by Microsoft Corporation,
SystemSoft Corp., Crystal Semiconductor Corporation, Phoenix Technologies, Ltd., ATI
Technologies Inc., and NeoMagic, Inc. See the individual programs for additional copyright notices.
Microsoft, MS, MS-DOS, Windows and Windows NT are registered trademarks of Microsoft
Corporation. Pentium and the Intel Inside logo are U.S. registered trademarks and MMX is a U.S.
trademark of Intel Corporation. TrackPoint is a U.S. registered trademark of International Business
Machines.
All certifications may not be completed at product introduction. Check with your HP reseller for
certification status.
This equipment is subject to FCC rules. It will comply with the appropriate FCC rules before final
delivery to the buyer.
Hewlett-Packard Company
Mobile Computing Division
19310 Pruneridge Ave.
Cupertino, CA 95014, U.S.A.
This service manual provides reference information for the HP OmniBook 4100/4150. It is intended to
be used by HP-authorized service personnel in the installation, servicing, and repair of these products.
The manual is designed as a self-paced guide. It is intended to train you to install, configure, and
repair OmniBook computers. You can follow this manual without having equipment available.
The following table lists additional places where you can get supplementary information about
OmniBook products.
Sources of OmniBook Information
SourceAddress or NumberComments
HP External Webhttp://www.h p.com/omnibook
(http://www.europe.hp.com/omnibook,
European mirror)
HP US Reseller Webhttp://partner.americas.hp.comRestricted to Authorized Resellers
HP Asia Pacific Channel
Support Centre for DPSP
Partners
America OnlineKeyword: HPCall (800) 827-6364 for membership
CompuServeGO HPCall (800) 524-3388 for membership
HP Bulletin Board ServiceRefer to the latest Product Support
HP Support Assist CD-ROM(800) 457-1762US and Canada.
Microsoft Webhttp://www.microsoft.comInformation and updates for Windows
http://www.h p.com.auRestricted to DPSP Partners only.
(801) 431-1587Outside US and Canada.
No usage restriction.
only.
within the US.
within the US.
Plan for non-US BBS numbers.
operating systems.
viHP OmniBook 4100/4150
Product Information
The HP OmniBook 4100/4150 provides desktop performance and expandability as well as convenient
portability. It uses high-performance component technologies that make it capable of replacing a
desktop computer or serving as a portable multimedia presentation tool.
64 MB RAM in system
slot or 32 MB RAM on
motherboard.
Expandable to 320 or
288 MB.
14.1-inch TFT XGA
display.
AGP or PCI local bus
video.
64-bit graphics
controller with 4 MB
external video RAM,
3Dgraphics
acceleration.
Up to 16M colors
(XGA).
Zoomed Video
enabled.
Windows 95,
Windows 98, or
Windows NT 4.0
preinstalled.
DMI 2.0.
HP TopTools 2.6 or
3.0.
APM 1.2.
ACPI compliant.
On, Standby, Suspend,
Hibernate, Off.
Pentium II (233 to 400
MHz), or Pentium (266
MHz).
128 or 64 MB RAM in
slot or 32 MB RAM on
motherboard.
Expandable to 256 or
160 MB.
14.1- or 13.3-inch TFT
XGA display.
AGP or PCI local bus
video.
256- or 128-bit
graphics controller with
8, 4, 2.5 or 2 MB
internal video RAM.
Up to 16M or 64K
colors (XGA).
Zoomed Video
enabled.
Windows 95,
Windows 98, or
Windows NT 4.0
preinstalled.
DMI 2.0.
HP TopTools 2.6 to
4.5.
APM 1.2.
ACPI compliant.
On, Standby, Suspend,
Hibernate, Off.
Pentium II (300, 266,
or 233 MHz), or
Pentium (266, 233, or
200 MHz).
32 MB RAM on
motherboard.
Expandable to 160,
192, or 288 MB.
13.3-inch TFT XGA
display, or 12.1-inch
TFT or DSTN SVGA
display.
PCI local bus video.
128-bit graphics
controller with 2 MB
internal video RAM.
Up to 64K colors
(XGA), 16M colors
(SVGA).
Zoomed Video
enabled.
Windows 95,
Windows 98, or
Windows NT 4.0
preinstalled.
DMI 2.0.
HP TopTools 2.6 or
3.0.
APM 1.2.
ACPI compliant.
On, Standby, Suspend,
Hibernate, Off.
Intel Pentium II (366 or
300(PE) MHz).
32 MB RAM on
motherboard.
Expandable to
160 MB.
12.1-inch TFT SVGA
display.
AGP video.
256-bit graphics
controller with 2.5 MB
internal video RAM.
Up to 16M colors
(XGA).
Zoomed Video
enabled.
Windows 95,
Windows 98, or
Windows NT 4.0
preinstalled.
DMI 2.0.
HP TopTools 3.0.
APM 1.2.
ACPI compliant.
On, Standby, Suspend,
Hibernate, Off.
1
HP OmniBook 4100/4150Product Information1-1
Table 1-2. OmniBook 4100/4150 Series Models
OmniBook
Product *
OmniBook 4100
F1462
x
F1463x***Pentium
F1464
x
F1479
x
F1703
x
OmniBook 4150 Series
F1629
x
F1640
x
F1641
x
F1642
x
F1647
x
F1648
x
F1658
F1660
F1663
B
x
B
x
x
This table lists only base product configurations—custom configurations are not included.
*For the products listed:
"x" suffix means
**Intel Mobile Pentium or Pentium II processor.
*** Available only with Spring ’98 software—other OmniBook 4100 products rolled to Fall ’98 software. All
OmniBook 4150 products were released with Fall ’98 software or later.
B
The OmniBook 4150 Series has two classes of products with different internal designs, different software
drivers, and different BIOSes. Models marked with
4150B in this manual—other OmniBook 4150 models listed in this table are called 4150† in this manual,
and they have no marking after the serial number.
CPU **DisplayHard DriveFloppy DriveCD-ROM
Drive
Pentium II
233 MHz
13.3-inch
XGA TFT
4 GB
(F1467A)
1.44 MB
(F1472A)
CD-ROM
(F1474A)
Standard
RAM
32 MB
14.1-inch
266 MHz
Pentium II
266 MHz
XGA TFT
6 GB
(F1475A)
4 GB
(F1467A)
13.3-inch
XGA TFT
Pentium II
300 MHz
14.1-inch
XGA TFT
6 GB
(F1475A)
1.44 MB
(F1472A)
CD-ROM
(F1474A)
64 MB
(F1457A)
Pentium II
333 MHz
Pentium II
366 MHz
Pentium II
300 MHz
Pentium II
400 MHz
Pentium II
366 MHz
Pentium II
400 MHz
Pentium II
366 MHz
13.3-inch
XGA TFT
14.1-inch
XGA TFT
10 GB
(F1744A)
4.8 GB
(none)
10 GB
(F1744A)
4.8 GB
(none)
6 GB
(F1475A)
4.8 GB
(none)
DVD Drive
(F1653A)
CD-ROM
(F1474A)
DVD Drive
(F1653A)
CD-ROM
(F1474A)
128 MB
(F1622A)
64 MB
(F1457A)
64 MB
(F1457B)
64 MB
(F1457A)
"N", "NT", “NV”, “NG” for Windows NT 4.0 installed (marketing distinction only), or
"W", "WT", “WV”, “WG”, “WR” for Windows 95 or Windows 95/98 installed (marketing distinction only).
B
have “4150 B” after the serial number and are called
1-2Product InformationHP OmniBook 4100/4150
Features and Operation
The following three illustrations point out the main external features of the computer. They are
followed by highlights of the computer’s operation. For an internal, exploded view, see page 4-2.
Latch
Main status lights
Keyboard status lights
Microphone
Power button
Pointing stick
Touch pad
Speaker
PC Card slots
Click buttons
(above and below
the touch pad)
Module latch
Speaker
AC adapter socket
Mute button
PC Card eject buttons
Audio jacks
Figure 1-1. OmniBook - Front View
Battery
PS/2 port
USB port
System-off button
Speaker
Module latch
Plug-in module bay
Figure 1-2. OmniBook - Side View
HP OmniBook 4100/4150Product Information1-3
Infrared
port
Kensington
lock slot
Parallel
port
Serial
port
VGA
out
Docking
port
Figure 1-3. OmniBook - Rear View
Turning the OmniBook On and Off
•On. Press the blue power button to turn on the OmniBook.
Standby. The display turns off automatically if the computer is inactive for about 2 minutes.
•
Suspend. Click Start, Suspend (Windows 95) or press the blue power button briefly (about 1
•
second) to suspend activity when the OmniBook is on. When you turn on the computer, it
resumes your previous work session.
Closing the lid (for more than 2 seconds) also suspends the computer.
•
Hibernate. Press Fn+F12. This is like Off, except that your current work session is first saved to
disk. When you turn on the computer, it reboots and restores your previous session.
•Off. Click Start, Shut Down. If the OmniBook does not respond, press and hold the blue power
button until the display shuts down. When you turn on the computer, it reboots. Unsaved data is
lost.
Table 1-3. Activating Power Modes
Power ModeTo Enter ModeTo Turn Back On
Standby
Reduced-power/stopped state. Display is off.
Everything is in a reduced-power state. Network
devices are maintained. Your current work session
continues at turn-on (any key or pointer action).
Suspend
Low-power/stopped state. Lower power state than
Standby. Everything is off or in a low-power state.
Network devices are off. Your previous work
session resumes at turn-on. For plug-and-play
operating systems, network connections resume at
turn-on.
Hibernate
No-power/stopped state. Session is saved on the
hard disk. Everything is shut down. Computer
reboots at turn-on and restores previous session
and network connections (if plug-and-play).
Off
No-power/stopped state. Everything is shut down
(battery continues charging if ac adapter is
connected). Computer reboots at turn-on and
restores network connections.
Press Fn+S (not Windows 98)
–or–
allow time-out.
Press blue power button for about
1 second
–or–
click Start, Shut Down, Standby
(Windows 98)
–or–
click Start, Suspend (Windows 95)
–or–
allow time-out.
Press Fn+F12
–or–
allow time-out.
Click Start, Shut Down
–or–
Press and hold the blue power
button until the display shuts down.
Press any key or
move a pointing
device to display
the current session
("Instant-On").
Press blue power
button to display
the current session
("Instant-On").
Press blue power
button to restart
and restore the
previous session.
Press blue power
button to restart
with a new session.
1-4Product InformationHP OmniBook 4100/4150
Checking the Status of the OmniBook
The main OmniBook status lights, located at the front-right edge of the display bezel at the top of the
display, indicate power status and drive activity. (These lights are on the LED strip cable.)
Table 1-4. Main Status Lights (LED Strip Cable)
The keyboard status lights, located above the keyboard, indicate the states of the keyboard locks.
(These lights are on the VGA PCA for the OmniBook 4100, and on the motherboard for the
OmniBook 4150 Series.)
Meaning
Power mode
Steady green light: OmniBook is running (On mode).
Steady orange light: OmniBook is suspended (Suspend or Standby mode).
No light: OmniBook is off (Off or Hibernate mode).
Green and orange lights: OmniBook failed when resuming.
Drive access
Green light: OmniBook is accessing the hard disk drive, floppy disk drive, or a drive
in the plug-in module bay. For the OmniBook 4100, it also indicates PC Card
activity.
Charging
Steady green light: AC adapter is connected, battery is full or stopped charging.
Blinking green light: AC adapter is connected, battery is charging.
No light: AC adapter is not connected or battery is not present.
Table 1-5. Keyboard Status Lights (VGA PCA or Motherboard)
Meaning
Caps Lock
Caps Lock is active.
Keypad Lock
The embedded keypad is active (Fn+F8 or Fn held down). Num Lock must also be
on for the numeric keys—otherwise, cursor control is active.
Num Lock
Num Lock is active.
In addition, the battery module has five lights that indicate its charge level. To view the lights, you
have to remove the battery and press the pad on the back next to the connector. The number of lights
that turn on indicates the charge.
HP OmniBook 4100/4150Product Information1-5
Using Fn Hot Keys
The Fn key combined with another key is a hot key—a shortcut key sequence for various system
controls. For an external keyboard, CTRL+ALT is normally equivalent to the Fn key.
Table 1-6. Fn Hot Keys
Hot KeyEffect
Fn + F1Decreases the display’s brightness.
Fn + F2Increases the display’s brightness.
Fn + F3Decreases the display’s contrast (non-TFT displays only).
Fn + F4Increases the display’s contrast (non-TFT displays only).
Fn + F5Switches among the built-in display, an external display, and simultaneous displays.
Fn + F8Toggles the embedded keypad on and off. Does not affect an external keyboard. If
Num Lock is on, then the numeric functions are active—otherwise, cursor control is
active.
Fn + F12Enters Hibernate mode.
Fn + REnters Suspend mode.
Fn + SEnters Standby mode (Windows 95, Windows NT) or Suspend mode (Windows 98).
Fn + ScrLkToggles Scroll Lock on and off.
Fn + UP ARROW
Fn + DOWN ARROW
Increases and decreases the sound volume.
Resetting the OmniBook
1. Use a pen or a straightened paper clip to push the system-off button on the left side of the
OmniBook. (The switch is on the motherboard.)
–or–Press and hold the blue power button until the display shuts down. (The switch is on the
motherboard.)
2. After the computer shuts down, press the blue power button to turn it back on.
Note
The OmniBook can boot from a CD if all these conditions are true:
• You have an internal CD-ROM or DVD drive installed,
• You have a bootable CD in the drive, such as the OmniBook Recovery CD, and
• You select the CD-ROM or DVD drive as the boot device. You can do this during reboot by
pressing ESC to cancel the OmniBook screen, then ESC to display the boot-device menu for
a one-time selection.
1-6Product InformationHP OmniBook 4100/4150
System Resources
Below are default values for system resources. To see other, non-default possibilities, use the BIOS
Setup utility (see page 3-26), which lists port and audio device configurations in the System Devices
menu.
The tables in this section show typical resource usage as set up by the OmniBook BIOS. Plug-andplay operating systems, drivers, and BIOS Setup settings may change some of the entries.
Video Controller (OmniBook 4150B)
11Free
12Pointing device
13Numeric data processor
14Internal hard disk (primary IDE controller)
15Internal CD-ROM drive (secondary IDE controller)
†Models called 4150† in this manual have no marking in the serial number,
whereas models called 4150B have 4150 B after the serial number.
Table 1-9. System Input/Output Addresses (100-3FF)
120-127Audio (OmniBook 4150† only)
170-177Internal CD-ROM drive (secondary IDE controller)
1F0-1F7Internal hard disk (primary IDE controller)
220-22FAudio
376Internal CD-ROM drive (secondary IDE controller)
378-37FLPT1 (printer port)
388-38BAudio
3B0-3BBVGA adapter
3C0-3DFVGA adapter
3E0-3E1PCMCIA controller
3F0-3F5Floppy controller
3F6Internal hard disk (primary IDE controller)
3F7Floppy controller
3F8-3FFCOM1 (serial port)
†Models called 4150† in this manual have no marking in the serial number,
whereas models called 4150B have 4150 B after the serial number.
Table 1-10. DMA Channels
0Sound record (OmniBook 4100/4150†)
Free (OmniBook 4150B)
1Sound playback
2Floppy drive
3LPT1 (ECP parallel port)
4Cascade
5Free
6Free
7Free
†Models called 4150† in this manual have no marking in the serial number,
whereas models called 4150B have 4150 B after the serial number.
1-8Product InformationHP OmniBook 4100/4150
Specifications
The following tables list descriptions for the OmniBook and its accessories.
Table 1-11. OmniBook 4100/4150 Series Specifications
Physical Attributes
Processor and
Bus Architecture
Graphics
Power
Mass Storage
RAMOmniBook 4150† or 4150B:
Size: 330.5mm×256.9mm×35-36.5mm (13.0"×10.1"×1.3-1.4").
Weight: 2.92-2.99 kg (6.45-6.60 lb.).
300/333/366/400 MHz Pentium II processor with internal 256 KB 4-way, setassociative L2 cache.
–or–
233/266/300-MHz Intel Pentium II, or 266-MHz Intel Pentium processor with 512-KB
pipeline-burst-synchronous L2 cache.
14.1- or 13.3-inch XGA active-matrix (TFT) display.
Zoomed Video support for lower PC Card slot.
OmniBook 4150B:
ATI Mobility-M or -M1 graphics accelerator with 4- or 8-MB video RAM (1024 ×
768 × 16M colors).
2X AGP graphics capability.
OmniBook 4150†:
256-bit NeoMagic MagicGraph graphics accelerator with 2.5-MB video RAM (1024
× 768 × 16M colors).
1X AGP graphics capability.
OmniBook 4100:
128-bit NeoMagic MagicGraph graphics accelerator with 2-MB video RAM (1024 ×
768 × 64K colors).
Zoomed Video support for both PC Card slots.
Rechargeable 9-cell lithium ion battery with LED charge-level gauge (10.8 Vdc,
4.2 AH or more, 45 watt-hours or more).
Battery life (one battery): up to 3-4 hours typical (varies with type of usage and
model).
Fast battery recharge: 80% in 1.5-2 hours, 100% in 2-2.5 hours.
Low-battery warning.
Suspend/resume capability.
60-watt ac adapter: 100 to 240 Vac (50 to 60 Hz) input, 19 Vdc, 3.16 A output.
4, 6, or 10 GB removable hard drive.
Standard 1.44-MB floppy drive module.
Standard 24X CD-ROM drive module or DVD drive module.
Optional LS-120 SuperDisk module.
Optional DVD drive.
Optional 10 GB second hard drive module.
128 MB or 64 MB SDRAM in first RAM slot.
Two total slots for RAM expansion up to 256 MB (using 128 MB modules).
66 MHz RAM bus, or 100 MHz RAM bus for OmniBook 4150B.
OmniBook 4100:
32-MB SDRAM on motherboard.
One slot for RAM expansion up to 160 MB.
66 MHz RAM bus.
HP OmniBook 4100/4150Product Information1-9
Audio System
Keyboard and
Pointing Device
Input/Output
Expandability
Preinstalled Software
Security Features
Environmental Limits
16-bit, Sound Blaster Pro-compatible.
SRS 3D enhanced audio.
Stereo sound via two built-in speakers.
Built-in microphone.
Line-in, headphone-out, and microphone-in.
87/88-key touch-type QWERTY keyboard with 101/102 key emulation.
Embedded numeric keypad.
12 function (Fn) keys.
Two pointing devices: pointing stick (technology licensed from IBM) and touch pad.
FDD/IDE interface for external module bay.
Universal serial bus (USB).
9-pin, 115,200-bps serial (16550 UART).
25-pin bi-directional ECP/EPP parallel.
Video-out (up to 1024×768×64K colors, or up to 1600×1200×64K or 16M colors for
OmniBook 4150B. Refresh rate 60 to 85-Hz).
Dual display.
PS/2 keyboard/mouse.
4-Mbps IrDA-compatible infrared port.
One Type III or two Type II 16-/32-bit PC Card slots (3.3- and 5-V support).
CardBus enabled.
Plug-in module bay for accessory modules.
Optional port replicator, mini dock, and docking system.
Microsoft Windows 95, Windows 98, or Windows NT 4.0.
Windows 95/98-compatible Plug-and-Play.
Windows NT 4.0 APM and PC Card Plug-and-Play.
Advanced Power Management (APM 1.2).
DMI 2.0 with HP TopTools 2.6 to 4.5
DiagTools.
Agate Tioman for HP (Hot Swap).
Adobe Acrobat Reader.
Virus Scan software.
Online documentation.
OmniBook Recovery CD-ROM included.
Centralized worldwide BIOS and driver update service.
User and administrator passwords.
System, hard drive, and docking passwords.
PC identification displayed at boot.
DMI-accessible electronic serial number.
Kensington Microsaver lock slot.
Operating temperature: 5 to 35 °C (41 to 95 °F).
Operating humidity: 20 to 90 percent RH (5 to 35 °C).
Storage temperature: –20 to 50 °C (–4 to 122 °F).
1-10Product InformationHP OmniBook 4100/4150
Major ICsOmniBook 4150B:
CPU: Intel Mobile Pentium II.
South Bridge: PIIX4M.
Video: ATI Mobility-M or -M1.
Audio: ESS ES1978 Maestro-2E and ESS ES1921.
CardBus: TI PCI 1225.
Keyboard controller: National PC87570.
Super I/O: SMC 869.
OmniBook 4150†:
CPU: Intel Mobile Pentium II.
South Bridge: PIIX4E.
Video: NeoMagic MagicGraph NM2200 (NMG5).
Audio: NeoMagic MagicGraph NM2200 (NMG5) and NeoMagic Audio MNA2.
CardBus: TI PCI1220A.
Keyboard controller: National PC87570.
Super I/O: SMC 769.
OmniBook 4100:
CPU: Intel Mobile Pentium or Pentium II.
South Bridge: PIIX4E.
Video: NeoMagic MagicGraph NM2160 (NMG4).
Audio: Crystal CS4237B.
CardBus: TI PCI1250A.
Keyboard controller: National PC87570.
Super I/O: SMC 769.
†Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B
F1467A4-GB internal hard disk drive
F1475A6-GB internal hard disk drive
F1744A10-GB internal hard disk drive
Modules
F1465A/BDVD drive module (with DVD player card)
F1470ALS-120 SuperDisk drive module
F1472AFloppy drive module
F1473AFloppy drive cable for external use
F1474A24X CD-ROM drive module
F1653A/B4X DVD drive module
F1746A10-GB second hard drive module
Power Options
F1454A60-watt ac adapter
F1455A75-watt auto/airline power adapter
F1466ALithium-ion battery (primary and secondary)
F1620ABattery charger (external)
8120-6312
F1623A10/100-Mbps Ethernet + 56-Kbps modem PC Card by
F1625A56-Kbps global modem PC Card by Xircom
F1626A10/100-Mbps Ethernet PC Card by 3Com
F1627A56-Kbps US modem PC Card by Xircom
F1643ARealport 10/100-Mbps Ethernet + 56-Kbps modem PC
Replacement power cord (Australia)
Replacement power cord (U.S., Canada, Taiwan)
Replacement power cord (Europe)
Replacement power cord (Japan)
Replacement power cord (India, South Africa)
Replacement power cord (Argentina)
Replacement power cord (People’s Republic of China)
Replacement power cord (Chile)
Replacement power cord (Hong Kong,Singapore,U.K.)
Xircom
Card by Xircom
4150B4150
••• •
••• •
••• •
•••
••
•••
•••
•••
•••
•••
••
••
••• •
••• •
•••
•••
••• •
••• •
••• •
••• •
••• •
••• •
••• •
†
41002100/7100
•• •
•• •
•• •
••
1-12Product InformationHP OmniBook 4100/4150
Docks
F1451APort replicator
F1452AMini dock
F1453AMonitor stand (short) for F1451A and F1452A
F1468ADocking module bay adapter
F1477ADocking system and monitor stand (tall)
†Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B
have 4150 B after the serial number.
••• •
••• •
••• •
•••
••• •
HP OmniBook 4100/4150Product Information1-13
Internal Design
The motherboard PCA is the central component of the OmniBook design. It plays a role in virtually
all system functions. The CPU module (MMO) and most other subsystems connect to the
motherboard.
The following figure shows the connections among the replaceable electrical modules. As a substitute
for a functional block diagram, see the table on page 1-15—it lists the roles that the replaceable
modules play in each of the functional subsystems.
LCD Module
Keyboard cable connects to
VGA PCA (OmniBook 4100) or
motherboard (OmniBook 4150
Series).
Keyboard
(pointing stick)
Fan
CPU
Module
RAM
Board
SpeakerSpeaker
BIOS
IC
Plug-In
Module
or Battery
LVDS
PCA
VGA PCA
Motherboard
PCA
Inverter PCA
(microphone)
Top Case
(touch pad support)
PCMCIA
Socket
Hard Disk
Drive
Main
Battery
LED Strip
IR
PCA
DC-DC
PCA
PCMCIA
Cards
Audio Jack
PCA
LVDS PCA is not present in the
OmniBook 4150B.
The BIOS IC is not
removable on the
OmniBook 4150 Series.
Two RAM slots are
available on the
OmniBook 4150 Series.
The power switch and lid
switch are contained on
the motherboard.
All external connections
(except IR and audio) are
made to the motherboard.
Figure 1-4. Replaceable Module Diagram
1-14Product InformationHP OmniBook 4100/4150
Table 1-13. Functional Structure
Bootup
Processor
Memory
Power
Display
Hard disk
Floppy drive
Keyboard
Pointer
Audio
Status
Serial
Parallel
Infrared
PS/2 port
USB
Docking port
PCMCIA
†Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B
have 4150 B after the serial number.
CPU module
Motherboard
BIOS IC
Floppy disk module
Hard disk drive
MotherboardI/O controller, serial connector.
MotherboardI/O controller, parallel connector.
Motherboard
IR PCA
MotherboardKeyboard controller, PS/2 connector.
MotherboardBus controller (South Bridge), USB connector.
MotherboardDocking logic, docking connector.
Motherboard
PCMCIA socket
Main processor (MMO).
Primary system circuitry.
Code for basic system functions (part of motherboard on OB 4150).
First source of disk-based startup code.
Second source of disk-based startup code.
Main processor, numeric data processor, L1 and L2 cache.
Primary system circuitry.
No onboard RAM (OB 4150), or first 32 MB of RAM (OB 4100).
Changeable RAM (1 slot on OB 4100, 2 slots on OB 4150).
Video RAM.
Power storage.
AC adapter socket, power switch, lid switch, system-off switch, power
supply.
Power control circuitry.
AC-to-dc converter.
PCMCIA/zoomed video controller.
Display output, backlight.
Power converter for backlight.
Display drivers, LVDS processing (OB 4100/4150†).
Display/graphics controller, video RAM (OB 4150B: LVDS processing).
Hard disk controller.
Hard disk mechanism.
I/O controller, floppy connector.
Floppy disk mechanism.
Keyboard controller.
Keyboard BIOS (part of motherboard on OB 4150).
Key switches.
Keyboard controller, pointing stick controller (PS/2 output).
Keyboard BIOS (part of motherboard on OB 4150).
Pointing stick sensor.
Touch pad sensor, controller (PS/2 output).
Keyboard controller, plus keyboard LEDs (OB 4150).
Main LEDs.
Keyboard LEDs (OB 4100).
I/O controller.
Infrared transmitter/receiver.
PCMCIA controller.
PCMCIA connectors.
HP OmniBook 4100/4150Product Information1-15
Removal and Replacement
This chapter tells you how to remove and replace the following components and assemblies. The ones
marked by
Air vent cover (table on page 2-33).Audio jack cover (table on page 2-33).Audio jack PCA (table on page 2-33).
•Battery (page 2-3).BIOS IC (page 2-28).Bottom case (page 2-19).Cable holder (table on page 2-31).CPU bottom plate (table on page 2-33).CPU module (page 2-13).CPU top plate (table on page 2-33).DC-DC PCA (table on page 2-33).Display bezel (table on page 2-31).Display case (table on page 2-31).Display latch (table on page 2-31).
•Docking door (table on page 2-8).End cap (table on page 2-31).Fan (table on page 2-33).
•Foot (table on page 2-8).Frame (table on page 2-33).
•Hard disk drive (page 2-5).Heatsink parts (table on page 2-33).Hinge (table on page 2-31).
•Hinge cover (table on page 2-8).
• are user-replaceable.
Table 2-1. Removal Cross-Reference
Inverter PCA (table on page 2-31).
•I/O door (table on page 2-8).IR PCA (table on page 2-33).Keyboard (page 2-9).LCD brackets (table on page 2-31).LCD flex cable (table on page 2-31).LCD module (page 2-13).LCD shield (table on page 2-31).LED strip cable (table on page 2-31).LVDS PCA (table on page 2-33).Module latch (table on page 2-33).Motherboard (page 2-19).PCMCIA socket (table on page 2-33).
•Plug-in module (page 2-3).
•RAM board (page 2-4).
•RAM/BIOS cover (table on page 2-8).Speaker cover (table on page 2-33).Speaker (table on page 2-33).Spring, grounding (table on page 2-33).Strip cover (table on page 2-32).Top case (page 2-16).
•VGA connector cover (table on page 2-8).VGA PCA (table on page 2-33).
2
Caution
Always provide proper grounding when performing repairs. Without proper
grounding, an electrostatic discharge may damage the OmniBook and its
components.
HP OmniBook 4100/4150Removal and Replacement2-1
Notes
Reassembly steps are the reverse of the removal steps. Reassembly notes are included at the
end of each section below.
Symbols like this throughout this chapter show approximate full-size screw outlines. You
can use them to verify the sizes of screws before you install them. Installing a wrong-size screw
can damage the unit. (The symbol at the left represents an M2.5×5mm T-head screw.)
•IC (PLCC) removal tool (similar to OK Industries EX-5).
•OmniBook 4150† CPU removal tool (HP part number T-335665).
Table 2-3. Recommended Screw Torques
Screw Thread SizeTorque (kgf•cm)Torque (lbf•in)
M21.3 – 1.81.1 – 1.5
M2.5 (4–5 mm long)3.0 – 3.52.6 – 3.0
M2.5 (16–19 mm long)2.5 – 3.02.2 – 2.6
M33.0 – 3.52.6 – 3.0
2-2Removal and ReplacementHP OmniBook 4100/4150
Removing the Battery or Plug-In Module
(User-Replaceable)
Required Equipment
•None.
Removal Procedure
1.Unplug the ac adapter, if present.
2.Slide forward the module latch slider on the corner next to the module, then swing back the latch
to loosen the module.
3.Pull out the module.
4.Slide the latch back into the case.
Figure 2-1. Removing the Battery or Plug-In Module
Reassembly Notes
•Important: You must slide the latch forward before you can insert a module.
•You can install a battery in either bay. Any other type of module must be installed in the left bay.
HP OmniBook 4100/4150Removal and Replacement2-3
Removing a RAM Board
(User-Replaceable)
The OmniBook 4100 has 32 MB of RAM on the motherboard and has one RAM slot for installing
additional RAM. The OmniBook 4150 Series has no RAM on the motherboard and has two RAM
slots for installing RAM.
†Models called 4150† in this manual have no marking in the serial number, whereas models called
4150B have 4150 B after the serial number.
Caution
Handle the RAM board only by its edges and provide proper grounding. Otherwise, you may
damage the board due to electrostatic discharge.
•••
•••
•••
••
••
••
Required Equipment
•Small Phillips screwdriver.
Removal Procedure
1.Unplug the ac adapter, if present, and remove the battery.
2.Turn the unit bottom side up, then remove the two screws from the RAM/BIOS cover and remove
the cover.
3.Release the two latches at the sides of the RAM board, so the free edge of the board pops up.
4.Pull the board out of the connector.
Note:
OmniBook 4100 shown. For the
OmniBook 4150 Series, there are
two RAM slots (with no RAM built
into the motherboard).
Figure 2-2. Removing a RAM Board
2-4Removal and ReplacementHP OmniBook 4100/4150
Reassembly Notes
• Insert the RAM board into the connector at about a 30° angle until it is fully inserted. Then press
down at both sides until both latches snap closed.
Removing the Hard Disk Drive
(User-Replaceable)
Table 2-5. Hard Disk Drive Replacement Part Numbers
DescriptionPart NumberExchangeOmniBook
Part Number4150B4150†4100
Drive, hard disk (4.0GB, 12.7mm, IBM)0950-2671F1386-69100
Drive, hard disk (4.0GB, 12.7mm, Toshiba)0950-2865F1386-69101
Drive, hard disk (4.3GB, 9.5mm, IBM)0950-3409F1711-69100
Drive, hard disk (4.8GB, 9.5mm, IBM) *0950-3611F1711-69102
Drive, hard disk (6.4GB, 9.5mm, IBM) *0950-3442F1711-69101
Drive, hard disk (6.4GB, 12.7mm, IBM)0950-2785F1475-69100
Drive, hard disk (6.4GB, 8.4mm, Toshiba)0950-3675F1475-69102
Drive, hard disk (6.4GB, 12.7mm, Toshiba)0950-3397F1475-69101
Drive, hard disk (10.1 GB, 12.5mm, IBM) *0950-3443F1744-69101
*These hard drives are the preferred drives at the time of publication. Drives shipped in units are
subject to change without notice. For current information about preferred and approved drives for
these products, see the latest version of service note HDD-01.
†Models called 4150† in this manual have no marking in the serial number, whereas models called
4150B have 4150 B after the serial number.
•••
•••
•••
••
•
•
••
••
••
Required Equipment
•Small Phillips screwdriver.
•Small flat-blade screwdriver.
Removal Procedure
1.Unplug the ac adapter, if present, and remove the battery.
2.Turn the unit bottom side up.
3.Remove the hard drive screw from the bottom case.
4.Pull out the hard drive by its plastic tab.
Screw, M3×4mm
Figure 2-3. Removing the Hard Disk Drive
HP OmniBook 4100/4150Removal and Replacement2-5
5.If you are installing a new hard drive that does not have a cover, you can remove the cover parts
from the old hard drive:
• Remove the screw from the case, then pry open the flap. If necessary, use a flat-blade
screwdriver
• Use a flat-blade screwdriver to pry open the snaps at the ends of the case, then open the
connector-side of the case.
•Pry out the corner next to the connector, then lift out the connector and hard drive together.
•Unplug the internal connector and cable from the hard drive.
Spacer for 9.5mm HDD
(see Caution)
Screw, M3×4mm
HDD cover kit
Figure 2-4. Installing a Hard Drive in the Cover
Reassembly Notes
Spacers for 8.4mm HDD
(see Caution)
Caution
• Do not cover the vent hole in the top surface of the hard drive or in the case. If you cover the
hole, the hard drive could fail prematurely.
• If you install a 9.5-mm hard drive in the case, make sure you install the spacer on top of the
drive. If you install an 8.4-mm hard drive, make sure you stick the end spacer on the case and
install the top spacer on top of the drive.
•Pry out the connector corner of the case and insert the external connector and hard drive at the
same time. The connector seats in the lower part of the opening in the case.
• Secure the two tabs on the screw flap by inserting the corner tab last, while prying out the nearby
corner of the case.
• When you install the battery module, be sure the plastic tab on the hard drive case lays folds up
against the front of the case.
2-6Removal and ReplacementHP OmniBook 4100/4150
Important
• If you are installing a new hard drive, create a Hibernate partition on the drive before loading
any software—see the steps below.
Creating a Hibernate Partition – OmniBook 4100
1. If you do not have an OmniBook Recovery CD and internal CD-ROM (or DVD) module for the
computer you are repairing, create a Support Utility floppy disk now.
After inserting a formatted floppy disk in the floppy drive, do one of the following:
On an OmniBook 4100 with a Spring-98 factory software installation, click Start, Programs,
OmniBook, Create Support Utility Disk.
On any computer that has a CD-ROM drive, run makesupp from the
\Omnibook\Drivers\Hputils directory on the OmniBook 4100 Recovery CD.
2. Insert the Recovery CD in the CD-ROM drive—or insert the Support Utility disk in the floppy
drive.
3. Reboot the computer. If you are using the Recovery CD, press ESC during reboot to cancel the
OmniBook screen, ESC to display the boot-device menu, then select the CD-ROM drive as the
boot device.
4.When prompted, select “Create Hibernate Partition.”We recommend that you create a partition the same as the default option.
Creating a Hibernate Partition—OmniBook 4150 Series
1.Plug in the ac adapter.
2.Insert the Recovery CD in the CD-ROM drive.
3.Shut down and restart the computer—when you see the HP logo, press ESC two times.
4.Select the CD-ROM drive as the boot device.
5.When the Recovery CD dialog box appears, follow the displayed instructions. Accept the
recommended partition size. If you install the factory software, the recovery process can take up
to 10 minutes.
If you want to create the Hibernate partition without installing the factory software, click
Advanced and select the option to not install the operating system. If you intend to install
Windows NT, you should choose the FAT16 option or the Hibernate-only option.
Note: If, instead, you see an MS-DOS menu of options, select “Recover...” to create the
Hibernate partition and install the factory software, which can take up to 60 minutes. Or select
“Create Hibernate Partition” to not install the software. Accept the recommended partition size.
6. When prompted to reboot the computer, press CTRL+ALT+DEL and follow any displayed
instructions.
HP OmniBook 4100/4150Removal and Replacement2-7
Replacing Small Parts
(User-Replaceable)
The following small parts are user-replaceable.
Table 2-6. Replacing Small Parts (User-Replaceable)
PartReplacement Procedure
Docking Doors
Feet
Hinge Cover, Left
Hinge Cover, Right
I/O Door
Pointing Stick Cap
RAM/BIOS Cover
VGA Connector Cover
Open each door and flex the door until one side tab releases. To replace, see the
picture on page 2-28.
Insert a small flat-blade screwdriver under the foot and pry it loose. To replace, firmly
press the adhesive side of the foot into the recess.
With the display lid fully open, push back on the bottom edge of the hinge cover until
it unsnaps, then work it loose and lift it off. To install, make sure the front and back
tabs snap into the case.
With the display lid closed, push in the bottom of the hinge cover until it unsnaps,
then work it loose and lift it off. To install, make sure the front and back tabs snap
into the case.
With the door closed, insert a small flat-blade screwdriver behind the door from
below. Flex the door until one side tab releases. It helps to press in lightly on the
ends of the door. To install, keep the icons on the door toward the top.
Pull the cap off the pointing stick.
On the bottom of the unit, remove the two screws from the RAM/BIOS cover and
remove the cover.
With the display closed, push up on the connector cover and down on the bottom
case until the lower tabs release. To install, insert the top tabs into the strip cover,
then push up on the cover and down on the bottom case until you can insert the
lower tabs.
2-8Removal and ReplacementHP OmniBook 4100/4150
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