HP Omnibook 4100 4150 Service Manual

HP OmniBook 4100/4150 Troubleshooting and Diagnostics 3-3
 · Separate Problems. If there is more than one symptom, separate them into distinct problems.
 · 
Consider Causes. Keep in mind possible causes for each problem. Use the diagnostic tools and
troubleshooting suggestions to help find possible causes.
  The OmniBook diagnostic program is the primary troubleshooting tool—it tests most
components using automatic and interactive tests. The table on page 3-4 shows how you can
use the different...

3-4 Troubleshooting and Diagnostics HP OmniBook 4100/4150
Suggestions for Troubleshooting
 Table 3-1. Scope of Diagnostic Tools
FunctionOmniBook
Diagnostics
Power-On
Self-Test
Sycard
PCCtest 450
DMI/TopTools
(if installed)
BIOS Setup
BootupTests Describes
(SafeTools)Configures
ProcessorTests
(System menu)Tests Describes
(AssetTools)
MemoryTests
(Memory menu)Tests Describes
(AssetTools)Describes
BatteriesDescribes
(AssetTools)
DisplayTests (Video,
Mem,User menus)Describes
(AssetTools)
Hard diskTests
(IDE...

HP OmniBook 4100/4150 Troubleshooting and Diagnostics 3-5
If you can’t isolate the cause of a problem using the diagnostic tools, you can use the suggestions in
the following table to help find the problem.
 Table 3-2. Troubleshooting Suggestions
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
To help determine likely causes, check to see what replaceable modules are involved in the system function and
what roles they play. See the table on page 1-15.
Startup
Does not...

3-6 Troubleshooting and Diagnostics HP OmniBook 4100/4150
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Does not boot from
floppy driveCheck floppy drive contacts.
Try using alternate
connection (with or without
floppy cable).
Check boot order in BIOS
Setup.
Check that floppy boot is
enabled in BIOS Setup.Floppy drive or
contacts.
Floppy cable.
Motherboard.
Error message
such as “Invalid
system disk” or
“Auto IDE error”Check for a disk in floppy
drive.
Remove and...

HP OmniBook 4100/4150 Troubleshooting and Diagnostics 3-7
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Battery does not
chargeCheck the power source.
Check battery contacts. If
available, try another battery
and ac adapter.
Check for high ambient
temperature and blocked air
vents.Battery or contacts.
AC adapter.
Motherboard.
Fan.
DC-DC PCA.Check ac adapter.
Check fan.
Second battery
does not work, main
battery worksTry swapping the two
batteries.
Check contacts on...

3-8 Troubleshooting and Diagnostics HP OmniBook 4100/4150
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Hard disk
Hard disk never
spinsCheck the power source.
Remove and reinsert the
hard drive. Check the
contacts.Hard drive or
contacts.
Motherboard.
Hard drive case (flex
cable).If the drive case is damaged,
it can prevent proper
operation.
Hard disk makes
clunking or
scratching noiseBack up the drive
immediately.
W as the computer or drive
dropped?Hard drive. Check...

HP OmniBook 4100/4150 Troubleshooting and Diagnostics 3-9
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Pointing stick
General problems Check settings in Control
Panel.
Check that the pointing stick
is enabled in BIOS Setup.Keyboard assembly.
Motherboard.Try reinserting the flex cable
in the connector on the VGA
PCA.
Special TrackPoint
driver features not
workingIf installed, remove
TouchPad driver support
using Add/Remove Program.
In Mouse Properties, select
the...

3-10 Troubleshooting and Diagnostics HP OmniBook 4100/4150
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Audio
Sound does not
playCheck settings in BIOS
Setup.
Increase sound volume
(Fn+UP and software
controls).
Check whether mute is active
(mute button and software
controls).
Check for sound resource
conflicts in Device Manager
(W indows 95/98) or
Administrative Tools or
Control Panel System
(W indows NT).Speakers.
VGA PCA
(OB 4150†).
Motherboard.Check operation...

HP OmniBook 4100/4150 Troubleshooting and Diagnostics 3-11
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
PCMCIA
General problems Make sure Card Executive is
installed for W indows NT.
If the card requires an IRQ,
check that there is one
available.
Check for conflicts or refresh
the device list in Device
Manager (W indows 95) or
Administrative Tools or
Control Panel System
(W indows NT).
Reboot the computer.
Try the card in the other slot
or in another computer....

3-12 Troubleshooting and Diagnostics HP OmniBook 4100/4150
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Computer pauses
or runs sluggishlyMay be normal W indows
behavior (background
processing can affect
response time).
If the hard disk has spun
down to conserve power, it
can take several seconds to
spin up. You can hear this.
You can run BIOS Setup and
change the hard disk time-
out to match the Suspend
time-out.
Certain background
operations (such as HP COE
virus...