I have 2 IDE drives and 1 SATA drive. It was working fine, then I took the SATA drive out and put in another one, plugged the new SATA drive in to test it. I took it out and put the original SATA drive back in with the same data and power cable it had been using when it was working fine and how the bios see's it just like it did before but the computer will no longer boot up. It says invalid boot disk now. What could possibly be wrong?