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56 Advanced Troubleshooting
www.dell.com | support.dell.com
A possible graphics card failure has occurred.
• If the computer has a graphics card, remove
the card (see "Removing PCI and PCI
Express Cards" on page 89), reinstall it, 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, contact Dell (see
"Contacting Dell" on page 142
).
A possible floppy drive 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.
No memory modules are detected.
• If you have two or more memory modules
installed, remove the modules, reinstall one
module (see "Installing Memory" on
page 80), 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 80).
• If the problem persists, contact Dell (see
"Contacting Dell" on page 142
).
Memory modules are detected, but a memory
configuration or compatibility error exists.
• Ensure that no special memory
module/memory connector placement
requirements exist (see "Memory" on
page 79).
• Verify that the memory modules that you are
installing are compatible with your computer
(see "Memory" on page 79).
• If the problem persists, contact Dell (see
"Contacting Dell" on page 142
Light Pattern Problem Description Suggested Resolution