Diagnostic Lights - Dell OptiPlex GX260 Series System User's Manual

4. Run the Dell Diagnostics.
If any of the tests fail, contact Dell.
Test the cards
1. Turn off the computer and devices, disconnect them from their electrical outlets, wait 10 to 20 seconds,
and open the computer cover.
2. Reinstall one of the cards that you removed previously.
3. Close the computer cover, reconnect the computer and devices to electrical outlets, and turn them on.
4. Run the Dell Diagnostics.
If any of the diagnostics tests fail, the card you just reinstalled is faulty and needs to be replaced.
5. Repeat this process until you have reinstalled all cards.
If you have reinstalled all of the cards and the problem is not resolved, contact Dell.

Diagnostic Lights

To help you troubleshoot a problem, your computer is equipped with four lights on the back panel labeled "A," "B," "C," and
"D". These lights can be yellow or green. When the computer starts up normally, the lights flash. After the computer starts,
the lights remain 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
Instructions."
Back Panel Diagnostic Light Codes
Light Problem Description
pattern
off Normal off condition or
off possible pre-BIOS
off failure
off
green Possible BIOS failure;
yellow the computer is in the
yellow recovery mode
yellow
yellow Possible processor
green failure
yellow
yellow
green Possible memory
green failure
yellow
yellow
yellow Possible expansion
yellow card failure
green
yellow
Suggested Resolution
Verify that the computer is plugged into a working outlet and that you have
pressed the power button.
Run the BIOS Recovery Utility, wait for recovery completion, and restart the
computer to retest.
Reseat the processor, and restart the computer to retest.
Reseat all memory modules and restart the computer to retest.
Remove each expansion card individually, and restart the computer to retest.
Reinstall the expansion card(s) one at a time, and restart the computer to
retest.
Move each expansion card one at a time to another PCI slot, and restart the
computer to retest.
"CAUTION: Safety