OMGthatsCraZY

Member
Sep 28, 2002
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I just bought a case and it came with a 350w power supply. if i plug the PSU in ONLY, and turn it on, should the fan spin? because i tried it and it doesnt...does it need the mobo to be attached first? thanks.
 

bozo1

Diamond Member
May 21, 2001
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For starters, you need to short the green wire with one of the blacks to turn it 'on'. The back on/off switch is just a master switch - you still need the turn-on signal from the motherboard to start it up, or simulate it by shorting the two pins I mentioned.

Secondly, the powersupply also needs to be under a load to turn on - a hard drive will do.