So I was installing windows, and the PSU connected to the Mobo was loose I guess, and it shut the pc down during windows installation, now I fixed the loose connection but when I start up the computer again, all I get is a blank black screen, I have tried unplugging the hard drive to see if I just can get the BIOS but I cant even get to the BIOS. Can anyone help? I'm using a core i3 processor, ASRock z75 mobo, WD Caviar Blue 500gb hard drive.