I have an HP pavilion a6763w. It is all stock except for a new hard drive. I tried booting my computer and the monitor did not receive a signal. When I turn it on all the fans come on and it seems to be running normally. I reseated my CPU and ram and tried booting with just one ram stick. I tried booting with everything but the necessities unplugged and it still says no signal. the only thing that I can think now is that my mother board has just up and quit. Please help.