Dell OptiPlex 320 Quick Reference Manual

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Dell OptiPlex 320 Quick Reference Manual Manual pdf 34 page image

34 Quick Reference GuideDiagnostic LightsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4" on thefront or back panel. The lights can be "off" or green. When the computer starts normally, the patterns orcodes on the lights change as the boot process completes. If the POST portion of system boot completessuccessfully, all four lights display solid green for a short time, and then turn off.If the computer malfunctions during the POST process, the pattern displayed on the LEDs may helpidentify where in the process the computer halted. If the computer malfunctions after a successfulPOST, the diagnostic lights do not indicate the cause of the problem.NOTE: The orientation of the diagnostic lights may vary depending on the system type. The diagnostic lights can beeither vertically or horizontally oriented.Light Pattern Problem Description Suggested ResolutionThe computer is in a normal "off"condition, or a possible pre-BIOS failurehas occurred.The diagnostic lights are not lit after thecomputer successfully boots to theoperating system.Plug the computer into a working electricaloutlet and press the power button.A possible BIOS failure has occurred; thecomputer is in recovery mode.Run the BIOS Recovery utility, wait forrecovery completion, and then restart thecomputer.A possible processor failure has occurred. Reinstall the processor and restart thecomputer. For information on reinstalling theprocessor, see your online User’s Guide.