Dell Precision T3400 (Late 2007) - Manual (Page 36)

36 Quick Reference Guide
A possible expansion
card failure has
occurred. 1 Determine if a conflict exists by
removing an expansion card (not a
graphics card) and restarting the
computer (see "Cards" in your User’s
Guide).
2 If the problem persists, reinstall the
card you removed, then remove a
different card and restart the
computer.
3 Repeat this process for each expansion
card installed. If the computer starts
normally, troubleshoot the last card
removed from the computer for
resource conflicts (see "Restoring Your
Operating System" in your User’s
Guide).
4 If the problem persists, contact Dell
(see "Contacting Dell" in your User’s
Guide).
Light Pattern Problem Description Suggested Resolution