I have an Asus P67 Sabertooth mobo and a Antec P193 case. When I first power up it starts then shuts down and restarts then boots fine. I have the power plugged in correctly according to the board layout. To be on the safe side if the case was wired wrong I even tried reversing the position of the + and - connectors. But exact same issue is there. I am not sure what else to try at this point.