Yesterday I pressed 'standby or hibernate' in windows 8 Beta and now my computer wont turn on at all. It works very well with windows 8 for a long time.

The reset and power switch on the motherboard keep flashing. I have turned the power off and on numerous times and get the same result. I also unplugged the power supply from the motherboard, as well as the main power cord. I got the same result after plugging it back in.

I do not want to have someone who charges an arm and a leg to look at it if i can fix it myself.
Any help in this would be highly appreciated.