HP Omnibook 4000c Ct Service Manual

___________31 Upper Case, Sound Board (PCB Assy PK-688/PK-AUD),
and PCA Display Connect PK-LSP
(HP Authorized Support Providers Only)
Required Equipment:
· Phillips Screwdriver
Components to remove prior Upper Case, Sound Board (PCB Assy PK-688/PK-
AUD), and PCA Display Connect PK-LSP:
1. HDD, FDD, and Battery
2. Icon Assembly and Display Module
3. Palm Rest Assembly
4. Keyboard Assembly
5. Power Board (optional)
Removal Procedure:
1. Remove Battery, Floppy Disk Drive, and Hard Disk Drive.
2. Follow the...

___________32PCB Assy PK-
688/PK-Aud
(Sound Board)Screw ISOBM2x6LMicrophone AssemblyUpper CasePCA DisplayConnect PK-LSPScrew ISOB
M2.6x5L
Qty (3)LSP-M/BShielding PlatePCA Assy PK-DC
(Power Board)Screw ISOB
2.6x5LAudio Ports (part of
Sound Board
Assembly)
Figure 10 - Upper Case and Display Connect 

___________33 Keyboard Grounding Plate, CPU, and System Board
(HP Authorized Service Providers Only)
Required Equipment:
· Phillips Screwdriver
· Nutdriver (5 mm or 3/16 in)
Components to remove prior Keyboard Grounding Plate, CPU, and System
Board:
1. HDD, FDD, and Battery
2. Icon Assembly and Display Module
3. Palm Rest Assembly
4. Keyboard Assembly
5. Power Board
6. Upper Case, Sound Board, and Display Connect
Removal Procedure:
1. Remove Battery, Floppy Disk Drive, and Hard Disk Drive.
2. Follow the...

___________34Screw ISOBM2.6x5LStandoff 10mmK/B Grounding
PlateTrack Ball and
Sub Battery-M/B
HarnessesPCA Proc(CPU)Standoff 15mmScrew ISOB
M2.6x5L
Qty (2)PCA Main PK-486(System Board)PCMCIA ButtonAssemblyLower CaseCPU Shielding
Plate
Figure 11 - System Board and Keyboard Grounding Plate 

___________35 Enhanced Port Replicator
(Exchange Assembly)
The Enhanced Port Replicator (EPR) for the OmniBook 4000 contains no field
replaceable components.  If any component of the EPR is defective, the entire unit
must be replaced.
Troubleshooting Tips:
· The OmniBook 4000 will only detect one pointing device at a time.  Therefore, if
an external mouse is connected to the EPR, the track ball will not be active.
· When an external mouse is detached, the pointing devices settings must be
manually...

___________36 Configuration and Setup
Main Configuration Screen
Pressing [fn][f2] invokes the BIOS setup and configuration utility.  Users can check
system configuration and changes settings using [f] keys from this screen.  This is
the most accurate place to check battery and system status.  Pressing [f3] from this
screen exits back to the current application. 

___________37 Power Screen
The power screen contains the current power level of the main and auxiliary
battery.  If there is no auxiliary battery, the text is dimmed (or in a passive color).
Power conservation settings consists of the options shown.  When Custom is
selected, suspend after, hibernate after and HDD stop after settings can be
changed by the user (indicated again by the settings in brackets [  xxx  ]).  When
any of the other selections are chosen by the user, the system will show the...

___________38 Power Configuration
To implement the power management capabilities, the following settings are set by
the user from the power setup screen.  The CPU doze will automatically occur and
will not be user selectable.
Setting:Parameters:DefaultComments:Power
Conservation
ModeAdvanced;
Standard; Off;
CustomAdvancedIn advanced mode the
user can not change the
settings,  they are preset.Suspend AfterDisable; Time
(1 - 15 minutes)2 minutesHow long the system will
stay in Run with (no
activity) until...

___________39 Power Defaults
Advanced, Standard, Off and Custom, power conservation default values are:AdvancedStandardOff:CustomSuspend After1 minute2 minutesDisabled1 minuteHibernate After:15 minutes60 minutesDisabled15 minutesHDD Stop After:30 secondsDisabledDisabled30 seconds 

___________40 System Configuration
The system screen contains the processor and memory information for the user to
glance at.  It also allows the user to set the date and time. The real time clock is
not changed until the user exits the setup program.   The user can also enable or
disable the processor cache.
When the user decides to enable a password, a pop up window requests the old
password, new password and confirmation of the new password.  Hard drives or
mass storage are not affected by the...