I have 2 different Hard Drives that work in other Computers or my PS2 so I know it's not the Hard Drives themselves.. Here is the problem I have a HDD USB Enclosure that a few days ago worked when plugged in.. It would detect the drive and I would be able to get to work with it.. Now the computer isn't detecting the HDD Enclosure on either Hard Drive at all... I can plug in a MP3 Player and it will come up or a flash drive and it will come up so I know it's not the USB Ports (Or so I think it it's not) ... But here's the kicker.. If I take the HDD's out of the enclosure and put them in the computer as slave drives the computer won't even turn on.. but as soon as I remove the cable from either one of the HDD's in ? then the computers HDD will kick in and turn on and boot up.. SO At this point even accesssing these drives from the comp itself isn't an option... Everything was fine a few days ago.. What could it be?