Advanced Troubleshooting 41
A possible video card failure has 
occurred.
• If the computer has a video card, 
remove the card and reinstall it 
(see page 62), and restart the 
computer. 
• If the problem still exists, install 
a video card that you know works 
and restart the computer.
• If the problem persists or the 
computer has integrated video, 
contact Dell (see page 90).
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.
No memory modules are detected.
• Reinstall all memory modules 
(see page 75) and restart the 
computer.
• To eliminate the possibility of a 
faulty memory connector, remove 
all memory modules (see 
page 75), reinstall one memory 
module (if the computer 
supports a single module), and 
then restart the computer. If the 
computer starts normally, move 
the memory module to a 
different connector and restart 
the computer. Continue until 
you have identified a faulty 
connector or reinstalled all 
modules without error.
Light Pattern Problem Description Suggested Resolution
= yellow
= green
= off
A B C D
A B C D
A B C D
A B C D