Dell GX520 Light Pattern Problem Description Suggested Resolution, If you have one memory module

Light Pattern	Problem Description	Suggested Resolution
	Memory modules are detected, but a	• If you have one memory module
	memory failure has occurred.	installed, reinstall it and restart the
		computer. For information on
		reinstalling memory modules, see your
		online User’s Guide.
		• 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. For
		information on contacting Dell, see your
		online User’s Guide.
	A possible graphics card failure has	• If the computer has a graphics card,
	occurred.	remove the card, reinstall it, and then
		restart the computer.
		• If the problem still exists, install a
		graphics card that you know works and
		restart the computer.
		• If the problem persists or the computer
		has integrated graphics, contact Dell.
		For information on contacting Dell, see
		your online User’s Guide.
	A possible floppy or hard drive failure has	Reseat all power and data cables and
	occurred.	restart the computer.

A possible USB failure has occurred.

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

Quick Reference Guide

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