Troubleshooting 77
Memory modules are 
detected, but a memory 
failure has occurred.
• If two or more memory 
modules are installed, remove 
the modules (see "Removing 
Memory" on page 108), then 
reinstall one module (see 
"Installing Memory" on 
page 106) and restart the 
computer. If the computer 
starts normally, continue to 
install additional memory 
modules (one at a time) until 
you have identified a faulty 
module or reinstalled all 
modules without error.
• If available, install working 
memory of the same type into 
your computer (see "Installing 
Memory" on page 106).
• If the problem persists, contact 
Dell (see 
"Contacting Dell
" on 
page 200).
A possible graphics card 
failure has occurred.
• Reseat any installed graphics 
cards (see "Cards" on 
page 109). 
• If available, install a working 
graphics card into your 
computer.
• If the problem persists, contact 
Dell (see 
"Contacting Dell
" on 
page 200).
A possible floppy drive or 
hard drive failure has 
occurred.
Reseat all power and data cables.
A possible USB failure has 
occurred.
Reinstall all USB devices and 
check all cable connections.
Light Pattern  Problem Description Suggested Resolution
book.book  Page 77  Tuesday, November 27, 2007  10:29 AM