How to turn on or test a Power Supply (PSU) without a PC/Motherboard

You can quiet easily test a computer power supply (PSU) without the need for it to be connected into a computer. Simply follow these steps:

- Take a spare piece of wire about 6cm to 8cm long, strip the ends and bend it in a "U" shape.

- Place one end of the wire in the slot connected to the green wire and the other end in a slot connected to a black wire (There are usually multiple black wires. You can use any of them)

  - Plug in the power cord into the back of the power supply. If the power supply comes on without any incident then your PSU is working. If it doesn't then you know it is broken and you can go out and buy a new one.