The beep codes would help determine the possible cause of not being able go on BIOS. The manufacturing site most likely will give the corresponding documentation. It would also be best to start powering up the PC with bare essentials like a stick of RAM and onboard graphics if available. You could also test the mobo with only a PSU do determine the random restart problem.
Edited by jhayz, 19 May 2012 - 11:22 PM.