Troubleshooting Tools; Diagnostic Lights - Dell Dimension C7565 Owner's Manual

Troubleshooting Tools

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 front panel (see page 55). The lights can be yellow or green. When the computer starts
normally, all four lights flash solid green. After the computer starts and the user accesses the
operating system, all four lights go off. If the computer malfunctions, the color and sequence of the
lights identify the problem.
Light Pattern Problem Description
The computer is starting normally.
A possible processor failure has occurred.
• The computer is in a normal on condition
and the operating system is running.
• The computer is in a normal off condition.
Suggested Resolution
None.
• None.
• If the computer is off, plug it into a working
electrical outlet and press the power button.
Contact Dell (see page 118).
Troubleshooting Tools
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