Dell UY691 manual Computer. If the computer starts

Light Pattern	Problem Description	Suggested Resolution
	Memory modules are	• If two or more memory modules are
	detected, but a	installed, remove the modules, then
	memory failure has	reinstall one module and restart the
	occurred.	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 (see "Memory"
		on page 115).
		• If available, install working memory of
		the same type into your computer (see
		"Memory" on page 115).
		• If the problem persists, contact Dell
		Support.
	System board failure	Contact Dell Support.
	has occurred.
	A possible processor	• Reseat the processor (see "Memory"
	failure has occurred.	on page 115).
		• If the problem persists, contact Dell
		Support.
	A possible graphics	• Reseat any installed graphics cards.
	card/video failure has	• If available, install a working graphics
	occurred.
		card into your computer.
		• If the problem persists, contact Dell
		Support.
	A possible LCD	• Reseat the LCD cable (see your
	failure has occurred.	computer’s Service Manual).
		• If the problem persists, contact Dell
		Support.
	A possible keyboard	• Reseat the keyboard (see "Keyboard"
	failure has occurred.	on page 113).
		• If available, connect an external
		keyboard.
		• If the problem persists, contact Dell
		Support.

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Troubleshooting