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.
Symptom
Table 3-2. Troubleshooting Suggestions
| Call Center: |
| Repair Center: |
| Repair Center: |
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| Suggestions |
| Likely Causes |
| Comments |
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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
Startup
Does not boot on ac or battery
Does not boot on battery (boots on ac)
Does not boot from floppy drive
Error message such as “Invalid system disk” or “Auto IDE error”
Check the power source. Push
Unplug the ac adapter and remove all batteries, then reconnect power.
Remove any RAM board and try again. Reinsert and try again.
Check battery level on battery LEDs.
Check battery contacts. If available, try another battery.
Check 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.
Check for a disk in floppy drive.
Remove and reinsert hard drive.
Check boot order in BIOS Setup.
AC adapter.
RAM board.
CPU module.
Motherboard.
VGA PCA.
LCD module.
Hard drive.
Battery or contacts.
Floppy drive or contacts.
Floppy cable. Motherboard.
Hard drive contacts. Hard drive.
Check ac adapter. Remove any RAM boards and retry.
If power status light does not turn on, reprogram BIOS, replace
If power status light turns on but display remains off, try external monitor. If monitor shows successful boot, replace LCD module. If monitor shows activity but BIOS does not complete, replace CPU module. If monitor is blank, replace VGA PCA, replace CPU module, replace motherboard.
If power status light and display turn on, BIOS completes, but OS does not start from hard disk or from floppy drive, replace CPU module, then motherboard. If OS starts from floppy drive, reload hard drive, replace hard drive.
If unit boots from floppy drive, check for corrupt files on hard drive, reload hard drive, replace hard drive.
HP OmniBook 4100 | Troubleshooting and Diagnostics |