Dell T3400 manual Configuration or, Hardware failure has

Light Pattern	Problem Description	Suggested Resolution
	No memory modules	• If two or more memory modules are
	are detected.	installed, remove the modules (see
		"Removing a Memory Module" in your
		User’s Guide), then reinstall one
		module (see "Installing a Memory
		Module" in your User’s Guide) and
		restart the computer. If the computer
		starts normally, continue to install
		additional memory modules (one at a
		time) until you have identified a
		faulty module or reinstalled all
		modules without error.
		• If available, install working memory of
		the same type into your computer (see
		"Memory" in your User’s Guide).
		• If the problem persists, contact Dell
		(see "Contacting Dell" in your User’s
		Guide).
	System board failure	Contact Dell (see "Contacting Dell" in
	has occurred.	your User’s Guide).
	Memory modules are	• Ensure that no special requirements
	detected, but a	for memory module/connector
	memory	placement exist (see "Memory" in your
	configuration or	User’s Guide).
	compatibility error	• Ensure that the memory you are using
	exists.
		is supported by your computer (see
		"Memory" in your User’s Guide).
		• If the problem persists, contact Dell
		(see "Contacting Dell" in your User’s
		Guide).
	A possible system	• Perform the procedures in "Restoring
	board resource and/or	Your Operating System" in your User’s
	hardware failure has	Guide.
	occurred.	• If the problem persists, contact Dell
		(see "Contacting Dell" in your User’s
		Guide).

Quick Reference Guide

35