Dell Precision 490 Quick Reference Guide página 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.
1
Determine if a conflict exists by removing a card
(not a graphics card) and restarting the computer.
2
If the problem persists, reinstall the card that you
removed, remove a different card, and then restart the
computer.
3
Repeat this process for each card. If the computer starts
normally, troubleshoot the last card removed from the
computer for resource conflicts (see "Resolving Software
and Hardware Incompatibilities" on page 32).
4
If the problem persists, contact Dell.
Watch your monitor for on-screen messages.
None.