Popular question I know. New build. I have everything hooked up correctly (99% sure). GIGABYTE motherboard (socket 1155), i7 chip, Antec 300 case ... My first power source was a cooler master 600w. I got everything installed, hooked up, etc. Turned it on and got nothing. Not even a fan moved. I figured it was a bad power source so I returned it and got and Antec 750w power source, installed it, still nothing. I confirmed with a friend that everything is hooked up correctly but nothing fires up. Not even the power source fan. Could this be a bad motherboard? I'd think even if the motherboard was bad at least the fan(s) would start moving. Could be wrong I've never had this happen before. The Power +/- are plugged into the board in the right place but I suppose there could be a problem with the case wiring? Any ideas are greatly appreciated. Thanks and go easy on me. First post here.