Troubleshooting Tools; Diagnostic Lights - Dell Dimension YH242 Owner's Manual

Troubleshooting Tools

Diagnostic Lights

CAUTION:
Before you perform any of the procedures in this section, follow the safety instructions in the
Product Information Guide.
To help you troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the front
panel (see "Front View of the Computer" on page 13). When the computer starts normally, the lights
flash before turning off. If the computer malfunctions, the sequence of the lights help to identify the
problem.
Light Pattern Problem Description
The computer is in a normal "off"
condition or a possible pre-BIOS failure
has occurred.
All four diagnostic lights display solid
green and then turn off after the system
successfully boots to the operating
system.
A possible processor failure has occurred. Contact Dell (see "Contacting Dell" on
Suggested Resolution
• Plug the computer into a working
electrical outlet (see "Power Problems"
on page 59).
• If the problem persists, contact Dell
(see "Contacting Dell" on page 137).
page 137).
Troubleshooting Tools
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