Advanced Troubleshooting; Diagnostic Lights - Dell XPS /Dimension Gen 2 Service Manual

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Advanced Troubleshooting

Dell™ Dimension™ XPS Service Manual
Diagnostic Lights
Beep Codes
System Messages

Diagnostic Lights

To help you troubleshoot a problem, your computer has four lights labeled "A," "B," "C," and "D" on the back panel. The lights can be yellow or green. When
the computer starts normally, the lights flash. After the computer starts, all four lights display solid green. If the computer malfunctions, the color and
sequence of the lights identify the problem.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions.
Light Pattern Problem Description
The computer is in a normal off condition
or a possible pre-BIOS failure has
occurred.
A possible processor failure has occurred.
Memory modules are detected, but a
memory failure has occurred.
A possible expansion card failure has
occurred.
A possible video card failure has occurred.
A possible floppy or hard drive failure has
occurred.
A possible USB failure has occurred.
No memory modules are detected.
Suggested Resolution
Verify that the computer is plugged into a working electrical outlet and that you have
pressed the power button.
Reinstall the processor and restart the computer.
1. Reinstall all memory modules.
2. Ensure that all the connector tabs are locked.
3. Restart the computer.
4. If the problem persists, contact Dell.
1. Determine if a conflict exists by
restarting the computer.
2. If the problem persists, reinstall the card
card, and then restart the computer.
3. Repeat this process for each card. If the computer starts normally, troubleshoot
the last card removed from the computer for resource conflicts (If the problem
persists, contact Dell).
If the computer has a video card,
l
the computer.
If the problem still exists, install a video card
l
the computer.
If the problem persists or the computer has integrated video, contact Dell.
l
Reseat all power and data cables and restart the computer.
Reinstall all USB devices, check cable connections, and then restart the computer.
1. Reinstall all memory modules.
2. Ensure that all the connector tabs are locked.
removing a card (not a video card) and then
that you removed, remove a different
remove the card, reinstall it, and then restart
that you know works and restart