Diagnostic Lights - Dell OptiPlex 380 Mini-Tower Service Manual

Diagnostic Lights

To 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 flash
before turning off. If the computer malfunctions, the sequence of the lights help to identify the problem.
NOTE: After the computer completes POST, all four lights turn off before booting to the operating system.
Light Pattern Problem Description
The computer is in a normal off
condition or a possible pre-BIOS
failure has occurred.
The diagnostic lights are not lit
after the computer successfully
boots to the operating system.
A possible processor failure has
occurred.
Memory modules are detected, but
a memory failure has occurred.
A possible graphics card failure has
occurred.
A possible floppy drive or hard
drive failure has occurred.
A possible USB failure has occurred. Reinstall all USB devices and check all cable connections.
No memory modules are detected.
Memory modules are detected, but
a memory configuration or
compatibility error has occurred.
A possible expansion card failure
has occurred.
Another failure has occurred.
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Suggested Resolution
Plug the computer into a working electrical outlet.
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If the problem persists, contact Dell.
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Reseat the processor (see Processor information for your computer).
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If the problem persists, contact Dell.
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If two or more memory modules are installed, remove the modules, then reinstall one module
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and restart the computer. If the computer starts normally, continue to install additional
memory modules (one at a time) until you have identified a faulty module or reinstalled all
modules without error.
If available, install working memory of the same type into your computer.
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If the problem persists, contact Dell.
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Reseat any installed graphics cards.
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If available, install a working graphics card into your computer.
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If the problem persists, contact Dell .
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Reseat all power and data cables.
If two or more memory modules are installed, remove the modules, then reinstall one module
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and restart the computer. If the computer starts normally, continue to install additional
memory modules (one at a time) until you have identified a faulty module or reinstalled all
modules without error.
If available, install working memory of the same type into your computer.
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If the problem persists, contact Dell.
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Ensure that no special requirements for memory module/connector placement exist.
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Ensure that the memory you are using is supported by your computer (see the Specifications
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section for your computer).
If the problem persists, contact Dell.
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Determine if a conflict exists by removing an expansion card (not a graphics card) and
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restarting the computer.
If the problem persists, reinstall the card you removed, then remove a different card and
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restart the computer.
Repeat this process for each expansion card installed. If the computer starts normally,
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troubleshoot the last card removed from the computer for resource conflicts.
If the problem persists, contact Dell.
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Ensure that all hard drive and optical drive cables are properly connected to the system
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board .
If there is an error message on the screen identifying a problem with a device (such as the
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floppy drive or hard drive), check the device to make sure it is functioning properly.
If the operating system is attempting to boot from a device (such as the floppy drive or optical
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drive), check system setup to ensure the boot sequence is correct for the devices installed on
your computer.
If the problem persists, contact Dell.
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