Alienware Aurora R12 Service Manual

Running BIST

1. Turn off your computer.
2. On the back panel of the desktop, press the Power-Supply Diagnostics button.
3. Perform the following steps based on the conditions indicated.

   Table 1. Troubleshooting stepsThe following table provides the troubleshooting steps.

   Conditions	Inference	Next Steps
   The LED indicator displays a solid color without flickering or flashing, and the power-supply fan runs on a normal speed.	The power supply unit can deliver power to the computer, but something else is impeding the POST process.	You can carry on further diagnosis by checking the power button. If there is no issue with the power button, go to No POST troubleshooting.
   The LED indicator displays a solid color without flickering or flashing, or the power-supply fan runs on a normal speed.	The power supply unit cannot deliver power to the computer, and the problem could be caused by any component that is connected to the power supply unit, or the power supply unit itself.	You can disconnect parts from the power supply unit to isolate the source of the power failure, and go to No Power troubleshooting.