HP Omnibook 800csct Service Manual

43SymptomCall CenterRepair Centercomparing it to another OB800?
Is customer a heavy user?Some or all keys not workingRemove the 2 keyboard screws
and check keyboard flex cable
connections visually.  If not
aligned properly in the
connector, send in for repair.
These connectors can be
damaged if the proper tool is not
used to disconnect the cables.Check keyboard flex
connection.  If OK, try another
keyboard.  If still bad, replace
logic board.Computer noisy but workingHDD “clunking or scratchy”Was the...

44SymptomCall CenterRepair Center(i.e., doesn’t automatically
turn off after a preset
interval)send in for repair.  If not, check
the timeout settings in Omnibook
Power Management in the
Control Panel.  Set hard drive
timeout = computer timeout.  A
future BIOS will address this
issue.prevent timeout.  If so, replace
paw active assembly.Computer pauses and won’t
permit kybd or mouse input
for a few secondsThis is probably normal W95
behavior.  The operating system
processes events in the
background and...

45SymptomCall CenterRepair CenterDock latch jammed, won’t
permit computer to dockTry manual undocking to get the
system apart.  See dock User’s
Guide (pg 1-13 English or
appropriate language’s page) for
procedure.  Send in dock for
repair.Replace dockClock won’t keep timeIn Control Panel, click on Power.
Power Management must be set
to Advanced.  Has the computer
ever failed to resume and had a
dead battery (causing the clock
to stop)?  If so, replace the
BIOS.Verify that Power Management
is set to...

46TroublePossible CausesSolutions· The CD-ROM drive is not
accessible from the
OmniBook.· For Windows 95, the CD-
ROM drive was not turned
on when you plugged it
into the OmniBook.
· For Windows for
Workgroups, the CD-ROM
drive was not turned on
when you rebooted the
OmniBook.· Turn on the drive, then click Start,
Eject PC. When prompted,  unplug
and reconnect the SCSI adapter
cable to the OmniBook.
· Turn on the drive, then exit
Windows and press
CTRL+ALT+DEL to reboot.· The data from the CD is
not...

47· Make sure the mouse is plugged into the correct port. The mouse and keyboard ports look
the same.
· Turn the system off and on.
· Reboot the system.
· Undock the OmniBook, unplug and reconnect the ac adapter, then dock again.
If network connections don’t work
· Make sure that the LAN cable is connected.
· You normally lose connections when you turn off the system or undock.  See if your network
software has a reconnect feature.
· Check your configuration files to make sure that the network drivers...

48If the OmniBook isn’t released after pressing the Undock button
· If you’re using a password, make sure it’s accepted.
· If you’re prompted about shutting down devices, and if no applications are using those
devices, press ENTER. Otherwise, close those applications and try undocking again.
· To override the undocking software, press a paper clip or other thin object into the security
opening in the docking system. Hold it in while sliding one release latch forward. 

Part 3
Hardware Repair
· Battery
· Memory
· Hard Disk Drive
· Mouse
· Small Parts
· Keyboard
· Display
· CPU
· Logic PCA
· Paw Active
· Other Components and Accessories
CAUTION:Always provide proper grounding when performing any of the
following repairs.  An electrostatic discharge may cause irreparable
damage to the OmniBook and its components 

50Battery
(End User Replaceable)
WARNING:Do not mutilate, puncture, or dispose of batteries in fire.  The batteries can
burst or explode, releasing hazardous chemicals.  A rechargeable battery
pack must be recycled or disposed of properly.
Required Equipment
· none
Removal Procedure
1. Turn the OmniBook off.  If ac power is plugged in, don’t remove the ac power while the
battery is out.
2. Turn the unit over and slide the two latches away from body of battery and lift the battery
out.  See Figure 15....

51Memory
(End User Replaceable)
Required Equipment
· none
CAUTION:To avoid damage due to electrostatic discharge, handle the memory module
by the edges only.
Removal Procedure
1. Exit all applications, including Windows.
2. Remove the ac adapter and battery from the OmniBook.
3. Turn the unit upside down and slide the memory cover off by using the two finger grips. See
Figure 18 on page 52.
4. To remove the Memory Module, gently lift up the front of the module to disengage the pins.
CAUTION:If the memory...

52Replacement Procedure
1. To replace, position the non-connector end first, then press the front of the module down into
the connector.
CAUTION:Apply pressure to the memory module only on the connector to avoid
damaging the circuit board.Figure 18 - Removing the Memory Module