Hello, I'm Henjin, although I think I may already have posted in this thread about two years ago. That was two years ago, so I'll just say hello again. I dont know why, but I stopped coming here for whatever reason, so I thought I'd visit.
@Sick_J0ke: I dunno, it seems like his harddrive is the problem.
Did you try to plug in your hard drive power plug back in? That might be the issue. Try the other power connectors as well, make sure all connections are proper. If that doesnt solve it, then get an enclouser and another computer to transfer data, and do a fresh OS instal. If that doesnt work, then you need a new hard drive.