Dell OptiPlex 380 Service Manual

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Dell OptiPlex 380 Service Manual Manual pdf 13 page image

Diagnostic LightsTo help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the bank panel. When the computer starts normally, the lights flashbefore turning off. If the computer malfunctions, the sequence of the lights help to identify the problem.3-3-2 Invalid NVRAM configuration3-3-4 Video Memory Test failure3-4-1 Screen initialization failure3-4-2 Screen retrace failure3-4-3 Search for video ROM failure4-2-1 No timer tick4-2-2 Shutdown failure4-2-3 Gate A20 failure4-2-4 Unexpected interrupt in protected mode4-3-1 Memory failure above address 0FFFFh4-3-3 Timer-chip counter 2 failure4-3-4 Time-of-day clock stopped4-4-1 Serial or parallel port test failure4-4-2 Failure to decompress code to shadowed memory4-4-3 Math-coprocessor test failure4-4-4 Cache test failureNOTE: After the computer completes POST, all four lights turn off before booting to the operating system.Light Pattern Problem Description Suggested ResolutionThe computer is in a normal offcondition or a possible pre-BIOSfailure has occurred.The diagnostic lights are not litafter the computer successfullyboots to the operating system. Plug the computer into a working electrical outlet. If the problem persists, contact Dell.A possible processor failure hasoccurred. Reseat the processor (see Processor information for your computer). If the problem persists, contact Dell.Memory modules are detected, buta memory failure has occurred. If two or more memory modules are installed, remove the modules, then reinstall one moduleand restart the computer. If the computer starts normally, continue to install additionalmemory modules (one at a time) until you have identified a faulty module or reinstalled allmodules without error. If available, install working memory of the same type into your computer. If the problem persists, contact Dell.A possible graphics card failure hasoccurred. Reseat any installed graphics cards. If available, install a working graphics card into your computer. If the problem persists, contact Dell .A possible floppy drive or harddrive failure has occurred.Reseat all power and data cables.A possible USB failure has occurred. Reinstall all USB devices and check all cable connections.No memory modules are detected.  If two or more memory modules are installed, remove the modules, then reinstall one moduleand restart the computer. If the computer starts normally, continue to install additionalmemory modules (one at a time) until you have identified a faulty module or reinstalled allmodules without error. If available, install working memory of the same type into your computer. If the problem persists, contact Dell.Memory modules are detected, buta memory configuration orcompatibility error has occurred. Ensure that no special requirements for memory module/connector placement exist. Ensure that the memory you are using is supported by your computer (see the Specificationssection for your computer). If the problem persists, contact Dell.A possible expansion card failurehas occurred. Determine if a conflict exists by removing an expansion card (not a graphics card) andrestarting the computer. If the problem persists, reinstall the card you removed, then remove a different card andrestart the computer. Repeat this process for each expansion card installed. If the computer starts normally,troubleshoot the last card removed from the computer for resource conflicts. If the problem persists, contact Dell.Another failure has occurred.  Ensure that all hard drive and optical drive cables are properly connected to the systemboard . If there is an error message on the screen identifying a problem with a device (such as thefloppy drive or hard drive), check the device to make sure it is functioning properly.