How to Test a PSU (ATX Power Supply)

If your system is having issues turning on, you can check if your power supply unit (PSU) is functioning properly by performing a test.

You will need a paper clip or a PSU jumper to perform this test.

IMPORTANT: Make sure that you jump the correct pins when testing your PSU. Jumping the incorrect pins may result in injury and damages to the PSU. Use the image below to see what pins you need to jump.

To test your PSU:

  1. Shut off your PSU.
  2. Unplug all cables from the PSU except for the main AC cable and the 24-pin cable.
  3. Locate pin 16 and pin 17 on your 24-pin cable.
    • To find pin 16 and pin 17, count from the left with the clip facing up and the pins facing toward you. They will be the 4th and 5th pins when counting from left to right as shown in the photo example below.psu 24-pin power test

Post time: Feb-23-2023