power - PC won't start after abrupt electricity shutdown

My PC won't start after an abrupt power shutdown. The hard drive has not crashed or anything. The PC itself keeps coming on and going off without starting the OS. I have even switched drives but I'm still getting the same issue.

• The computer tries to start, the motherboard/fan makes a lot of noisy revolutions, then computer shuts itself down. Then tries to start again ... (same cycle again)