Dell Dimension B 110 Diagnostic Lights, Light Pattern Problem Description Suggested Resolution

Advanced Troubleshooting

Diagnostic Lights

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 (see page 50). 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.

Light Pattern		Problem Description	Suggested Resolution
		The computer is in a normal off	Plug the computer into a working
		condition or a possible pre-BIOS failure	electrical outlet and press the power
A B C	D	has occurred.	button.

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

A B C D

•If you have one memory module installed, reinstall it (see page 55) and restart the computer.

•If you have two or more memory modules installed, remove the modules, reinstall one module (see page 55), 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 (see page 55).

•If the problem persists, contact Dell (see page 93).

=yellow

=green

=off

Advanced Troubleshooting

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