Easy Way to Test a Computer Power Supply

Testing a Power Supply using a Jumper Wire

So you have pushed that power button on your computer and it won’t just turn on? well, the power supply unit could be the culprit but before buying a replacement why don’t you test it first to ensure that it is the one damaged or faulty.

Power supply units are the heart of your computer that is why – you shouldn’t limit your budget for cheap brands and I suggest go with the well-known reputable brands of power supply such as Corsair, CoolerMaster, FSP, and many more. On my gaming rig, I used a Cougar CMX 700watts V2 power supply and I’ve been using it for more than 2 years now without any problems. It is rated with Bronze efficiency and the next time I upgrade a power supply I’ll make sure that I will get at least Gold rated efficiency power supply.

Remove your computer power unit now from your computer system case and let’s begin testing it. You could also clean the power supply using a portable compressed air to blow the dust inside the main unit and other dirt.


What you will need on this troubleshooting guide are the following:

  1. A paper clip or copper wire
  2. Extension cord
  3. Power Supply Unit

You can watch my video below on how you could test a power supply unit. You will need a paper clip or a copper wire that is long enough to be used as a jumper wire on one of the psu cables such as the 24-pin cable. If the power supply fan start to rotate and it does not stop then it means the unit is still good, but if nothing happens double check your jumper wire and be sure you have shorted the right wires (1 green, 1 black). If still it doesn’t work then your PC power supply is dead already.

After following these easy steps and you have confirmed that your PSU is still working (the fan rotates) then it could be other reasons why your computer won’t turn on. It could be other hardware issues such as simple as faulty power button switch on your system case, damage Power supply cable, or worst case is your CPU is dead because of overheating issues.

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