Dell OptiPlex SX280 Serie Guide De Référence Rapide page 24

Light Problem Description
Pattern
off The computer is in a normal off
off condition or a possible pre-BIOS failure
off has occurred.
off
green A possible BIOS failure has occurred; the
yellow computer is in the recovery mode.
yellow
yellow
yellow A possible processor failure has occurred. Reinstall the processor and restart the computer.
green
yellow
yellow
green Memory modules are detected, but a
green memory failure has occurred.
yellow
yellow
yellow A possible floppy or hard drive failure has
green occurred.
green
yellow
24
Quick Reference Guide
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.
For information on reinstalling the processor,
see your online User's Guide.
• If you have one memory module installed,
reinstall it and restart the computer. For
information on reinstalling the memory
module, see your online User's Guide.
• If you have two memory modules installed,
remove the modules, reinstall one module,
and then restart the computer. If the computer
starts normally, reinstall an additional module.
• If available, install properly working memory
of the same type into your computer.
• If the problem persists, contact Dell.
Reseat all power and data cables and restart
the computer.