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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 |
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To help determine likely causes, find out which replaceable components are involved in the system involved, and what roles they play. See Figure
Startup
Does not boot on | Check the power source. | AC adapter. | Check the AC adapter. |
AC or battery. | Press the | 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. | |
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| ||
| Remove any SDRAM |
| If the power mode light does |
| expansion module and try |
| not turn on, reprogram the |
| again. |
| BIOS; replace the |
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| motherboard. |
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| If the power mode light turns |
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| on but the display does not, |
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| try an external monitor. If the |
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| monitor shows a successful |
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| boot, replace the display |
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| assembly. If the monitor |
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| shows activity but the BIOS |
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| does not complete, replace |
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| the display assembly. If the |
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| monitor is blank, replace the |
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| motherboard. |
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| If the power mode light and |
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| display turn on and the BIOS |
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| completes, but the OS will |
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| not start from the hard disk or |
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| from a floppy drive, replace |
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| the motherboard. If the OS |
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| starts only from a floppy |
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| drive, reinstall the factory |
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| software onto the hard drive; |
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| replace the hard drive. |
Beeps once, spins |
| SDRAM module. | Make sure at least one |
hard disk, repeats, |
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| SDRAM module is installed. |
but does not boot. |
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|
Does not boot on | Check the battery level using | Battery or contacts. |
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main battery, but | the battery LEDs. | Motherboard. |
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boots on AC. | Check battery contacts. If |
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| available, try another battery. |
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Troubleshooting and Diagnostics | HP Omnibook 500 |