Diagnostic Light Codes During POST
Light Pattern | Problem Description | Suggested Resolution |
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|
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| The computer is | • Reseat the power cable in the power |
| either turned off or | connector on the back of the |
| not receiving power. | computer, and the electrical outlet. |
Off |
| • Bypass power strips, power extension |
| cables, and other power protection | |
|
| |
|
| devices to verify the computer turns |
|
| on properly. |
|
| • Ensure any power strips being used are |
|
| plugged into an electrical outlet and |
|
| are turned on. |
|
| • Ensure the electrical outlet is working |
|
| by testing it with another device, such |
|
| as a lamp. |
|
| • Ensure the main power cable and |
|
| front panel cable are securely |
|
| connected to the system board. |
|
|
|
| A possible | • Unplug the computer. Allow a minute |
| motherboard failure | for the power to drain. Plug the |
| has occurred. | computer into a working electrical |
|
| outlet and press the power button. |
Off |
| • If the problem persists, contact Dell |
|
| (see "Contacting Dell" on page 159). |
Troubleshooting
