Diagnostic Lights, Yellow LED, Green LEG

Diagnostic Lights

Light Pattern

Problem Description

Suggested Resolution

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

To help you troubleshoot a problem, your computer has four lights labeled "A," "B," "C," and "D" on the back panel. The lights can be yellow or green. When the computer starts normally, the lights flash. After the computer starts, all four lights display solid green. If the computer malfunctions, the color and sequence of the lights identify the problem.

The computer is in a normal off condition or

apossible pre-BIOS failure has occurred.

Memory modules are detected, but a memory failure has occurred.

Yellow LED

Plug the computer into a working electrical outlet and press the power button.

If you have one memory module installed, reinstall the memory module and restart the computer.

If you have two or more memory modules installed, remove the modules, reinstall one memory 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 of the same type into your computer.

If the problem persists, see "Contacting Dell" in your Owner's Manual for instructions on obtaining technical assistance.

A possible graphics	If the computer has a graphics card, remove the card, reinstall it, and
card failure has	then restart the computer.
occurred.	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, see
	"Contacting Dell" in your Owner's Manual for instructions on obtaining
	technical assistance.
A possible floppy or	Reseat all power and data cables and restart the computer.
hard drive failure has
occurred.
A possible USB failure	Reinstall all USB devices, check cable connections, and then restart the
has occurred.	computer.
Memory modules are	Ensure that no special memory module/memory connector placement
detected, but a	requirements exist (see Specifications).
memory configuration	Verify that the memory modules that you are installing are compatible
or compatibility error	with your computer (see Specifications).
exists.	If the problem persists, see "Contacting Dell" in your Owner's Manual for
	instructions on obtaining technical assistance.
A possible expansion	1. Determine if a conflict exists by removing a card (not a graphics card)
card failure has	and restarting the computer.