Dell Precision MD506 Quick Reference Manual page 42

Light Pattern Problem Description
Memory modules are detected,
but a memory configuration or
compatibility error exists.
Routine system activity
preceding video initialization.
A possible expansion card failure
has occurred.
Routine system activity
preceding video initialization.
The computer is in a normal
operating condition after POST.
NOTE:
flicker briefly; they are turned off
after the computer successfully
boots to the operating system.
42
Quick Reference Guide
The diagnostic lights
Suggested Resolution
• Ensure that no special memory module/memory
connector placement requirements exist.
• Verify that the memory modules that you are installing are
compatible with your computer.
• Reinstall the memory modules and restart the computer.
• If the problem persists, contact Dell.
Watch your monitor for on-screen messages.
Determine if a conflict exists by removing a card (not a
1
graphics card) and restarting the computer.
If the problem persists, reinstall the card that you
2
removed, remove a different card, and then restart the
computer.
Repeat this process for each card. If the computer starts
3
normally, troubleshoot the last card removed from the
computer for resource conflicts (see "Resolving Software
and Hardware Incompatibilities" on page 32).
If the problem persists, contact Dell.
4
Watch your monitor for on-screen messages.
None.