Diagnostic Lights - Dell Dimension 1100 Service Manual

Yellow LED
on
Green LEG

Diagnostic Lights

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 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.
Light Pattern Problem Description Suggested Resolution
The computer is in a
normal off condition or
a possible pre-BIOS
failure has occurred.
Memory modules are
detected, but a
memory failure has
occurred.
A possible graphics
card failure has
occurred.
A possible floppy or
hard drive failure has
occurred.
A possible USB failure
has occurred.
Memory modules are
detected, but a
memory configuration
or compatibility error
exists.
A possible expansion
card failure has
on off
Plug the computer into a working electrical outlet and press the power button.
If you have one memory module installed,
and restart the computer.
If you have two or more memory modules installed, remove the
modules,
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,
computer.
If the problem persists, see "Contacting Dell" in your Owner's Manual for
instructions on obtaining technical assistance.
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, see
"Contacting Dell" in your Owner's Manual for instructions on obtaining
technical assistance.
Reseat all power and data cables and restart the computer.
Reinstall all USB devices, check cable connections, and then restart the
computer.
Ensure that no special memory module/memory connector placement
requirements exist (see Specifications).
Verify that the memory modules that you are installing are compatible
with your computer (see Specifications).
If the problem persists, see "Contacting Dell" in your Owner's Manual for
instructions on obtaining technical assistance.
1. Determine if a conflict exists by removing a card (not a graphics card)
and restarting the computer.
off off
reinstall one memory module, and then restart the computer.
install properly working memory
reinstall the memory module
of the same type into your