I am having the exact same problem reported here:
http://forum.giga-byte.co.uk/index.php/topic,1053.msg4988.html#msg4988When I turn the system on, the fan spins up, then spins down, then spins up, then down - over and over. But the system never boots.
I've removed the CMOS battery and set the jumper to clear it as well - left the system sit for 30+ minutes unplugged - and still the same problem.
Right now I have disconnected everything except for the power supply. I've removed the ram, disconnected all drives, and I'm only supplying power to the MB - but still the same issue.
I have checked and I have both of the appropriate power connectors connected to the MB and I have tested this power supply in another system and it works fine.
Any suggesstions??
Thanks,
Paul