Dell OptiPlex GX280 User Manual
Page 139
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions located in
the Product Information Guide.
To help you troubleshoot a problem, your small form factor, small desktop, and small mini-tower computers have 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
patterns or codes on the lights change as the boot process completes. If the POST portion of system boot completes
successfully, all four lights display solid green. If the computer malfunctions during the POST process, the pattern displayed
on the LEDs may help identify where in the process the computer halted.
NOTE:
The orientation of the diagnostic lights may vary depending on the system type. The diagnostic lights can
appear either vertical or horizontal.
Y = Yellow
G = Green
Light Pattern
Problem Description
Suggested Resolution
The computer is in a
normal off condition or
a possible pre-BIOS
failure has occurred.
Plug the computer into a working electrical outlet and press the power button.
A possible BIOS failure
has occurred; the
computer is in the
recovery mode.
Run the BIOS Recovery utility, wait for recovery completion, and then restart
the computer.
A possible processor
failure has occurred.
Reinstall the processor and restart the computer.
Memory modules are
detected, but a
memory failure has
occurred.
If you have one memory module installed, reinstall it and restart the
computer. (see "
" for instructions on how to remove and install
memory modules.)
If you have two or more memory modules installed, remove the
modules, reinstall one module, and then restart the computer. If the
computer starts normally, reinstall an additional module. Continue until
you have identified a faulty module or reinstalled all modules without
error.
If available, install properly working memory of the same type into your
computer.
A possible expansion
card failure has
occurred.
Determine if a conflict exists by removing a card (not the graphics card)
and then restarting the computer.
If the problem persists, reinstall the card that you removed, remove a
different card, and then restart the computer.
Repeat this process for each card. If the computer starts normally,
troubleshoot the last card removed from the computer for resource
conflicts (see "
Resolving Software and Hardware Incompatibilities
Move each card one at a time to a different PCI slot and restart the
computer after each move.
A possible graphics
card failure has
occurred.
If the computer has a graphics card, remove the card, reinstall it, and
then restart the computer.
If the problem still exists, install a graphics card that you know works
and restart the computer.
If the problem persists or the computer has integrated graphics,
.
A possible floppy or
hard drive failure has
Reseat all power and data cables and restart the computer.