Dell T5400 manual Light Pattern, Suggested Resolution, in your User’s Guide, Problem Description

Light Pattern	Problem Description	Suggested Resolution
	A possible expansion	1	Determine if a conflict exists by removing
	card failure has		an expansion card (not a graphics card)
	occurred.		and restarting the computer (see "Cards"
			in your User’s Guide).
		2	If the problem persists, reinstall the card
			you removed, and then remove
			a different card and restart the computer.
		3	Repeat this process for each expansion
			card installed. If the computer starts
			normally, troubleshoot the last card
			removed from the computer for resource
			conflicts (see "Restoring Your Operating
			System" in your User’s Guide).
		4	If the problem persists, contact Dell
			(see "Contacting Dell" in your User’s
			Guide).
	Another failure	• Ensure that all hard drive and CD/DVD
	has occurred.		drive cables are properly connected to
			the system board (see "System Board
			Components" in your User’s Guide).

• If there is an error message on the screen identifying a problem with a device (such as the floppy drive or hard drive), check the device to make sure it is functioning properly.

• If the operating system is attempting to boot from a device (such as the floppy drive or CD/DVD drive), check the system setup program (see "System Setup" in your User’s Guide) to ensure the boot sequence is correct for the devices installed on your computer.

• If the problem persists, contact Dell (see "Contacting Dell" in your User’s Guide).

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