hmm, unfortunatley, I changed the platters over from a new drive. Bothe the hard drives don't work now, when you say the orientation, i have tried both ways incase I had flipped one over by accident. Neither of them read at all, and I was hoping there was something i had missed, I am aware that these drives are sensitive, but I now have two broken drives. they both hang my BIOS!!! I cant understand why, I bought a new drive with the same model number, but I still do not know why the drive broke in the first placed apart from dropping it. Are the motor assesmblies really sensitive to shock?