Troubleshooting Tools; Diagnostic Lights - Dell Dimension PY349 Owner's Manual

Troubleshooting Tools

Diagnostic Lights

CAUTION:
Before you begin 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 11). When the computer starts normally,
the lights flash. 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 are not lit
after the computer successfully
boots to the operating system.
A possible processor failure has
occurred.
Memory modules are detected,
but a memory failure has
occurred.
Suggested Resolution
Plug the computer into a working electrical
outlet and press the power button.
Contact Dell (see "Contacting Dell" on
page 122).
• If you have two or more memory modules
installed, remove the modules, reinstall
one module (see "Installing Memory" on
page 68), 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 "Installing Memory" on
page 68).
• If the problem persists, contact Dell (see
"Contacting Dell" on page 122).
Troubleshooting Tools
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