HP 330 Service Information Manual page 172

CAUTION
Remember to turn the unit off and unplug it before removing any
assembly. Use ESD precautions and a static-free workstation.
1. Turn the unit off.
2. Separate the bus expander from the computer.
3. Remove all accessories. Leave enough RAM installed that's configured at the top of
meIllory.
4. Leave the processor board in.
5. Renlove the top cover and disconnect the ribbon cable from the backplane.
6. Plug the unit in and turn it on. The Self-Test LED's should ripple and change state
several times.
7. If the LED's do not light or ripple, turn the computer off, unplug it, and relocate the
processor to the other system slot.
8. Plug the computer in, turn it on, and watch the LEOs. If the LED's don't light or ripple,
either the motherboard or processor is bad. Replace one or the other and retest until the
LED's light and/or ripple.
Before you can proceed further, the nlinimum configuration must work. If this configuration
works, then you can proceed to the next level, Functional Unit Troubleshooting.
Bus Expander Minimum Configuration
To get a nlinimum configuration in the bus expander, follow these steps after verifying the power
supply functions correctly.
CAUTION
Remember to turn the unit off and unplug it before removing any
assembly. Use ESD precautions and a static-free workstation.
1. Turn the unit off.
2. Remove all boards/cards except one that can be recognized by the self-test.
3. Plug the bus expander in and turn it on.
4. Turn the computer on.
5. Verify the self-test identifies and/or correctly tests the board/card in the bus expander.
If the board or card does not pass self-test, turn both units off, and relocate the board or
card to another slot.
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Troubleshooting