my PC did not power up when I pressed power button. The motherboard has lights (leds). turning power on at psu lights up leds. pressing power on pc button fires up the fans for < 1 second and then nothing.fans stop, boot process doesnt proceed but lights remain on board. So I buy a new psu (another 800 watt). I unplug all but bare essentials on board. same issue. I then take out the 8 pin adapter (so only the 24 pin is connected) and leds remains on and boot up starts (yipee). I then put the 8 pin in again and it fails in the same manner as before. Gigabyte GA EP45 DQ6 mobo 4 hard drives 2 dvd intel q550 ( I think) 4 x 2 gb RAM 800 watt psu any idea where fault lies? I assume board.