Power supply

Can someone tell me the best way to check a power supply that is out of my PC and see if it is working? It is a ATX power supply.

they sell power supply testers at most computer stores, i can't recommend a good one as I nvr did such a thing, i think they cost like 20$ or so

Here's how to test one:

Testing PSU voltages

Thanks guys, I always get great, fast responses here!!