Dell ND218 manual Restart the computer, If the problem still exists, install a, Contact Dell

Light Pattern	Problem Description	Suggested Resolution
	A possible graphics card failure	1	If the computer has a graphics card,
	has occurred.		remove the card, reinstall it, and then
			restart the computer.
		2	If the problem still exists, install a
			graphics card that you know works
			and restart the computer.
		3	If the problem persists or the
			computer has integrated graphics,
			contact Dell.
	A possible floppy or hard drive failure	Reseat all power and data cables and
	has occurred.	restart the computer.

A possible USB failure has occurred.

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

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