Dell K7821 manual If the computer has a graphics card, Restart the computer

Light Pattern			Problem Description	Suggested Resolution
			A possible graphics card failure has	• If the computer has a graphics card,
			occurred.	remove the card, reinstall it, and then
Y	G	Y	G	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.
Y	G	G	Y

A possible USB failure has occurred.

Y G G G

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

No memory modules are detected.

G Y Y Y

•If you have one memory module 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 modules of the same type into your computer.

•If the problem persists, contact Dell. For information on contacting Dell, see your online User’s Guide.

Quick Reference Guide

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