Dell T7400 manual Possible

Light Pattern	Problem Description	Suggested Resolution
	A possible	1	Determine if a conflict exists by removing
	expansion card		an expansion card (not a graphics
	failure has occurred.		card) 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
	has occurred.		CD/DVD 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).

Quick Reference Guide

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