78 Troubleshooting
No memory modules are 
detected.
• 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).
Memory modules are 
detected, but a memory 
configuration or 
compatibility error has 
occurred.
• Ensure that no special 
requirements for memory 
module/connector placement 
exist (see "Memory" on 
page 104).
• Ensure that the memory you 
are using is supported by your 
computer (see "Memory" on 
page 173).
• If the problem persists, contact 
Dell (see 
"Contacting Dell
" on 
page 200
).
Light Pattern  Problem Description Suggested Resolution
book.book  Page 78  Tuesday, November 27, 2007  10:29 AM