Im having trouble with a coworkers pc at work. He had an old pc that was pieced together. The power supply finally died. He was given another office computer to use that is also kinda old. I opened it to pop in his old hd as the slave so that he can access his stuff. After doing this the computer wouldnt fire up at all. The system setup at boot screen does not recognize a master or slave drive. I removed the hd and set the pc back how it was....still wont fire up at all. Any ideas? Both hds are IDE.