I removed the hard drive from my sister's pc and hooked it up to an external housing to recover some data for her, because her pc wouldn't enter safe mode so I could reset the passwords her x husband had set. When, I got all the data I needed off the hard drive, I reinstalled it, but now i get nothing but a fuzzy non responsive Compaq screen. I had figured I would just pull the hard drive copy the desired files reinstall the hard drive and re image the os but none of that seems to be working, I don't even think the pc is recognizing the hard drive is there at all. Any help would be much appreciated.