The following is a list of symptoms of a power supply problem: The power light is off and/or the device won’t turn on. The power supply fan does not turn when the computer is powered on. The computer sounds a continuous beep.

The following is a list of symptoms of a power supply problem: The power light is off and/or the device won’t turn on. The power supply fan does not turn when the computer is powered on. The computer sounds a continuous beep.