Dell DHP, T8243 manual Diagnostic Lights, Light Pattern Problem Description Suggested Resolution

Troubleshooting Tools

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 "1," "2," "3," and "4" on the back panel (see page 57). 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
	has occurred.	button.

A possible processor failure has occurred. Contact Dell (see page 108).

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

•If you have two or more memory modules installed, remove the modules, reinstall one module (see page 64), 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 63).

•If the problem persists, contact Dell (see page 108).

Troubleshooting Tools

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