If you cannot isolate the cause of a problem using the above diagnostic tools, use the suggestions in the following table to help find the problem.

Table 3-2. Troubleshooting Suggestions

Symptom

Call Center:

Repair Center:

Repair Center:

 

Suggestions

Likely Causes

Comments

 

 

 

 

To help determine likely causes, find out which replaceable components are involved in the system involved, and what roles they play. See Figure 1-11 on page 1-19 and Table 1-9 on page 1-20.

Startup

Does not boot on

Check the power source.

AC adapter.

Check the AC adapter.

AC or battery.

Press the system-off switch

SDRAM module.

Remove any SDRAM

 

to reset the computer.

Motherboard.

expansion module and try

 

Unplug the AC adapter and

Display assembly.

again.

 

remove all batteries, then

Hard drive.

Replace the system SDRAM

 

reconnect power.

module.

 

 

 

Remove any SDRAM

 

If the power mode light does

 

expansion module and try

 

not turn on, reprogram the

 

again.

 

BIOS; replace the

 

 

 

motherboard.

 

 

 

If the power mode light turns

 

 

 

on but the display does not,

 

 

 

try an external monitor. If the

 

 

 

monitor shows a successful

 

 

 

boot, replace the display

 

 

 

assembly. If the monitor

 

 

 

shows activity but the BIOS

 

 

 

does not complete, replace

 

 

 

the display assembly. If the

 

 

 

monitor is blank, replace the

 

 

 

motherboard.

 

 

 

If the power mode light and

 

 

 

display turn on and the BIOS

 

 

 

completes, but the OS will

 

 

 

not start from the hard disk or

 

 

 

from a floppy drive, replace

 

 

 

the motherboard. If the OS

 

 

 

starts only from a floppy

 

 

 

drive, reinstall the factory

 

 

 

software onto the hard drive;

 

 

 

replace the hard drive.

Beeps once, spins

 

SDRAM module.

Make sure at least one

hard disk, repeats,

 

 

SDRAM module is installed.

but does not boot.

 

 

 

Does not boot on

Check the battery level using

Battery or contacts.

 

main battery, but

the battery LEDs.

Motherboard.

 

boots on AC.

Check battery contacts. If

 

 

 

available, try another battery.

 

 

3-6

Troubleshooting and Diagnostics

HP Omnibook 500

Page 68
Image 68
HP 500 manual Troubleshooting Suggestions, Startup

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