We met one question that many customer ask about how to test one power supply to check if it’s good or bad when they met the situation the computer don’t start up? Because they don’t know it’s motherboard problem or psu.

Y7R0X 0Y7R0X 500W PSU For Dell G5 5090 7070 7060 D500E005P Power supply H500EPM-00

Here is the one solution of our tech. manager to show how to to check if the psu is good or bad.

1. Disconnect all output interfaces and only connect the power cord. Then find a conductive wire or a pinch.

2. Short-circuit the green and any black wires.

3. Observe whether the power light on the power supply cord lights up and whether the power fan rotates to determine whether the power supply is faulty.