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Testing PSU by itself?

D

Daniel

Diamond Member
Any way to run an ATX PSU to test it outside of the case without plugging it into anything? I've heard something about shorting 2 pins with a screwdriver which by itself seems a bit odd, any other ways to do this, and if not what pins do you short?
thanks,
Daniel
 
Friend, short the green pin with any of the black(ground) pins using either a paper clip or a short strand of bare-ended wire. There is only one green pin and it's usually beside a black pin. Cheers! 🙂
 
Ok I just tried that with a wire first, then a paper clip and no luck, and the ps works too, odd. You were referring to the pins for the motherboard connector right?
 
Yes, assuming that the PSU is ATX. If it is AT, it requires a double pole single throw switch, you have to mess with 4 wires that way, a blue, white, black, and brown I believe. But on ATX PSU's, shorting the green wire and the black one adjacent to it does the trick. Make sure that the switch on the back of the PSU is set to on and it's plugged in, then hold the wire there for a couple seconds. You should at least see some sparks if the wire is conductive. Otherwise, PSU might be hosed.
 
There needs to be a load on the powersupply for it to come on when you short the black/green wires. You need to hook up a hard drive or something. (Fans sometimes aren't enough of a load.)
 
Yes, it's universal. Switching powersupplies need to be under a load. It is possible that the fan within the powersupply itself was enough of a load but in most cases it is not.
 
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