Need Power Supply Help
So after succesfully installing a new power supply and 8800 gt on my computer, my dad and I thought it would be a piece of cake to do the same on my dads computer . Yet, once the power supply was in (corsair 620) the system failed to turn on. Everything is plugged in correctly and the motherboard light comes on. When you push the power button the power supply fan come on temporarily then shuts down. Does anybody know what could be causing this problem? Right now we are putting the old one back in, so if anybody has a solution try to hit me up quick.