[QUOTE]Originally posted by CrazeD
[B]You can test the PSU by jumping two wires.
Unplug the PSU from the wall, and then disconnect all the wires inside the PC. Take an old piece of wire and cut it to like 3 - 4 inches long, then strip both ends.
Take the 20+24 pin ATX connector and insert one end of the stripped wire into the GREEN wire, and then the other end into any BLACK wire. So that's one end in the GREEN wire, one end in any BLACK wire.
Now, plug it in.. see if it turns on. If it does, it could still mean that it is bad, by not having sufficient power to turn the computer on. However, if it doesn't turn on, you will know it was the PSU and you never even had to take it out.
If you mess something up or electricute yourself, I am in no way responsible.
The Elmer Fudd approach to PSU testing. The above proceedure is not only stupid but useless. It's called a multitester. You can check voltages at the 24 pin and 12 volt rails. Also check the voltages at the ground wires for both the 24 pin and 12v. If there is any more than .0010 milivolts on the grounds you have mobo circuit leakage and a damaged mobo. Additonally, +/- 5% on the voltages is your upper lower thresholds for PSU voltages. You can buy a nice digital Multitester at sears for $30!!! Sheesh!!!