Trying to troubleshoot an Asus A7V133 motherboard, I've got a green led that is lit indicating I have power, fans spin up, but I have no video out. I have an ATi Radeon 9600 Pro AGP card installed, a keyboard, and a mouse. I've tried hooking a monitor up to both VGA and DVI connections, but I get nothing. I have everything I can think of set to default on the motherboard. Any ideas on where to start?