Interestingly enough I somehow managed to have fixed it. I was JUST about to go to bed for the evening when I thought i'd try something totally off the wall..
All I did was unplug one of the fans that I had plugged into the CPU fan monitor (to prevent an error) .. so I forced an error in bios and low and behold it popped on.
All my hardware seems to be fine, but still worries me that it wouldn't post one minute.. but was fine the next.
anyways.. to answer some questions.. it is award bios... the 'beep' at the beginning is normal, it always beeps once when you boot it up. When there is an error with hardware or something, it beeps 3 times. (like when I unplugged the CPU fan)
I have no idea what caused it.