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Troubleshooting Tools and Utilities: Dell OptiPlex 320 User's Guide
the Product Information Guide.
To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4"on the front or back panel.
The lights can be off or green. When the computer starts normally, the patterns or codes on the lights change as the boot
process completes. When the computer starts normally, the patterns or codes on the lights change as the boot process
completes. If the POST portion of system boot completes successfully, all four lights display solid green. If the computer
malfunctions during the POST process, the pattern displayed on the LEDs may help identify where in the process the computer
halted.
NOTE:
The orientation of the diagnostic lights may vary depending on the system type. The diagnostic lights can
appear either vertical or horizontal.
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 BIOS failure has
occurred; the computer is in
the recovery mode.
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 or hard drive
failure has occurred.
A possible USB failure has
occurred.
No memory modules are
detected.
file:///N|/For_lekha/For%20Deepa/Nadia/UG/A00/en/nadia-temp-working-jul19/Nadia_UG_A00/Output/trouble.htm[5/22/2015 10:43:21 AM]
Suggested Resolution
Plug the computer into a working electrical outlet and press the power
button.
Run the BIOS Recovery utility, wait for recovery completion, and then
restart the computer.
Reinstall the processor and restart the computer.
If you have one memory module installed, reinstall it and restart
the computer. (see
install memory modules.)
If you have two or more memory modules installed, remove the
modules, reinstall one module, 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.
If the problem persists, contact Dell (see
If the computer has a graphics card, remove the card, reinstall it,
and then restart the computer.
If the problem still exists, install a graphics card that you know
works and restart the computer.
If the problem persists or the computer has integrated graphics,
contact Dell (see
Contacting
Reseat all power and data cables and restart the computer.
Reinstall all USB devices, check cable connections, and then restart the
computer.
If you have one memory module installed, reinstall it and restart
the computer. See
install memory modules.
If you have two or more memory modules installed, remove the
modules, reinstall one module, 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
Memory
for instructions on how to remove and
Contacting
Dell).
Memory
for instructions on how to remove and
Dell).
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