Middlebury

Dell Computer Diagnostic Codes

Consult the Official Dell Manuals

If at all possible please first consult the product specific section for decoding diagnostic LED codes: http://support.dell.com/support/topics/global.aspx/support/my_systems_info/manuals

Notes From the Field

  • We've noticed that one or two Dell Optiplex 760 small form factor computers have reported an error via this LED pattern:
    1-3-4 (where LEDs 1, 3 and 4 are lit during Windows startup - at the Windows logo). Reseating the graphics card (if it's discrete) has resolved the issue.

Generic Dell Troubleshooting Chart


Dell Desktop Power LED Codes
Desktop and Laptop Additional LED Codes
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