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36 Advanced Troubleshooting
A possible graphics card failure has
occurred.
• If the computer has a graphics card,
remove the card, reinstall it (see
page 58), 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,
contact Dell (see page 94).
A possible floppy or hard drive failure
has occurred.
Reseat all power and data cables and
restart the computer.
A possible USB failure has occurred. Reinstall all USB devices, check cable
connections, and then restart the
computer.
Memory modules are detected, but a
memory configuration or compatibility
error exists.
• Ensure that no special memory
module/memory connector placement
requirements exist (see page 55).
• Verify that the memory modules that
you are installing are compatible with
your computer (see page 55).
• If the problem persists, contact Dell
(see page 94).
Light Pattern Problem Description Suggested Resolution
= yellow
= green
= off
ABCD
ABCD
ABCD
ABCD