Dell T3913 manual Ensure that no special memory, Module requirements exist see, Memory Overview

Light Pattern					Problem Description	Suggested Resolution
				green	System board failure has occurred.	Contact Dell for technical assistance.
				yellow
A	B	C	D	yellow
				green
				green	Memory modules are detected, but a	• Ensure that no special memory
				yellow	memory configuration or compatibility	module requirements exist (see
					error exists.	"Memory Overview" in the
A	B	C	D	green
						User’s Guide).
				yellow		• 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.
				green	A possible expansion card failure	1 Determine if a conflict exists by
				yellow	has occurred.	removing a card (not a graphics card)
						and restarting the computer.
A	B	C	D	green
						2 If the problem persists, reinstall the
				green		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 your User’s Guide).
						If the problem persists, contact Dell.
				green	A possible system board resource and/or	Perform the procedures in your
				green	hardware failure has occurred.	User’s Guide.
A	B	C	D	yellow		If the problem persists, contact Dell.

yellow

= yellow = green = off

Quick Reference Guide

35