Advanced Troubleshooting; Diagnostic Lights - Dell Dimension 3100C Owner's Manual

Advanced Troubleshooting

Diagnostic Lights

CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions
located in the Product Information Guide.
Your computer has four lights labeled "1," "2," "3," and "4" on the front panel to help you
troubleshoot problems (see page 55). 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
The computer is in a normal "off" condition or
a possible pre-BIOS failure has occurred.
The diagnostic lights turn off after the system
successfully boots to the operating system.
NOTE:
the system does not start, there may be a
problem with the power supply or with the
processor.
A processor failure was detected.
Memory modules are detected, but a memory
failure has occurred.
If all of the diagnostic lights are off and
Suggested Resolution
Plug the computer into a working electrical
outlet Also see "Power Problems" on page 36.
Contact Dell (see page 102).
• If you have two or more memory modules
installed, remove the modules, reinstall one
module (see page 64), 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 (see
page 64).
• If the problem persists, contact Dell (see
page 102).
Advanced Troubleshooting
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