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