42 Quick Reference GuideMemory modules are detected,but a memory configuration orcompatibility error exists.• Ensure that no special memory module/memoryconnector placement requirements exist.• Verify that the memory modules that you are installingare compatible with your computer.• Reinstall the memory modules and restart the computer.• If the problem persists, contact Dell.Routine system activitypreceding video initialization.Watch your monitor for on-screen messages.A possible expansion card failurehas occurred.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 youremoved, remove a different card, and then restart thecomputer.3 Repeat this process for each card. If the computer startsnormally, troubleshoot the last card removed from thecomputer for resource conflicts (see "Resolving Softwareand Hardware Incompatibilities" on page 32).4 If the problem persists, contact Dell.Routine system activitypreceding video initialization.Watch your monitor for on-screen messages.The computer is in a normaloperating condition after POST.NOTE: The diagnostic lightsflicker briefly; they are turned offafter the computer successfullyboots to the operating system.None.Light Pattern Problem Description Suggested Resolution
