Diagnostic Light Codes During POST
The following table lists the codes for the diagnostic lights that occur while the computer is performing the POST.
NOTE: If the computer is turned on and all four diagnostic lights are not on, see "Diagnostic Light Codes Before POST" on page 33.
D i a g n o s t i c L i g h t C o d e s D u r i n g P O S T
Light Pattern | Cause | Action |
Possible BIOS failure, and the computer is in the recovery mode.
Run the BIOS Recovery utility, and restart the computer to retest. See "BIOS Recovery Utility" in the User’s Guide.
A B C D | If the problem is still not resolved, see "Reset |
| Corrupted BIOS Settings" in the User’s Guide. |
|
|
Possible microprocessor failure. | See "Microprocessor Problems" in the |
| User’s Guide. |
A B C D |
|
|
|
Possible memory failure. | See "System Memory Problems" in the |
| User’s Guide. |
A B C D |
|
|
|
Possible expansion card failure or conflict. | See |
| Conflicts" in the User’s Guide. |
A B C D |
|
|
|
Possible video card failure. | Reseat the video card, and restart the computer |
| to retest. For instructions on removing and |
A B C D | installing an expansion card, see "Removing an |
Expansion Card" in the User’s Guide. | |
| If the problem is not resolved, see "Expansion- |
| Card Problems" in the User’s Guide. |
| If the problem is still not resolved, contact Dell |
| for technical assistance. |
|
|
Possible diskette drive or | See "Diskette Drive Problems" and "Hard Drive |
| Problems" in the User’s Guide. |
A B C D |
|
|
|
= y e l l o w |
|
= g r e e n |
|
= o f f |
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Setup and Quick Reference Guide
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