Dell MD506 manual Light Pattern Problem Description

Light Pattern Problem Description Suggested Resolution

A possible USB failure has occurred.

Reinstall all USB devices, check cable connections, and then restart the computer.

No memory modules are	1	Reseat the memory modules to ensure that your computer
detected.		is successfully communicating with the memory.
	2	Restart the computer.
	3	If the problem still exists, remove all the memory modules
		and install one memory module in memory module
		connector DIMM_1.
	4	Restart the computer.
		A message appears stating that because your memory is
		not paired, the system will operate with reduced
		performance and reduced error-correction capability
	5	Press <F1> to boot to the operating system.
	6	Run the Dell Diagnostics. See your User’s Guide for more
		information.
	7	If the memory module passes, shut down the computer,
		remove the memory module, and then repeat the process
		with the remaining memory modules until a memory error
		occurs during start-up or diagnostic testing.
		If the first memory module tested is defective, repeat the
		process with the remaining modules to ensure that the
		remaining modules are not defective.
	8	When the defective memory module is identified, contact
		Dell for a replacement.
No memory modules are	• If you have one memory module installed, reinstall it and
detected.		restart the computer.
	• If you have two or more memory modules installed,
		remove the modules, reinstall one module, and then
		restart the computer). If the computer starts normally,
		reinstall an additional module. Continue until you have
		identified a faulty module or reinstalled all modules
		without error.
	• If available, install properly working memory of the same
		type into your computer.
	• If the problem persists, contact Dell.
System board failure has	Contact Dell for technical assistance.
occurred.

Quick Reference Guide

41