check that the mb is not grounding out to the case or the i/o shield. also check that the cpu cooler not shorting the mb out of the back side or the bottom of the case. also check that the 4 pin power that in the photo is plugged in. the mb wont post if it missing. also check that you got all the power plugs on the video card. some have 2 other have one. also check that the case header cables are on right. you could have the hard drive led lugged into the reset pins. would cause the mb to be stuck in reset.