Dell precision t7400 Quick Reference Manual page 27

Light Pattern Problem Description
Memory modules
are detected, but
a memory failure
has occurred.
A possible graphics
card failure has
occurred.
A possible floppy or
hard drive failure has
occurred.
A possible USB failure
has occurred.
Suggested Resolution
• If two or more memory modules are
installed, remove the modules
(see "Memory" in your User's Guide),
reinstall one module, and then 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 "Memory" in your User's Guide).
• If the problem persists, contact Dell
(see "Contacting Dell" in your
User's Guide).
• Reseat any installed graphics cards
(see "Cards" in your User's Guide).
• If available, install a working graphics
card into your computer.
• If the problem persists, contact Dell
(see "Contacting Dell" in your
User's Guide).
• Reseat all power and data cables and
restart the computer.
• If the problem persists, contact Dell
(see "Contacting Dell" in your
User's Guide).
• Reinstall all USB devices, check cable
connections, and then restart the
computer.
• If the problem persists, contact Dell
(see "Contacting Dell" in your
User's Guide).
Quick Reference Guide
27