I have a defective 250 gig Western Digital 10,000 rpm drive. I think the problem is the controller card on the exterior of the drive. The drive spins up. The drive is fairly quiet. Just will not access. Can I change the circuit board from an IDENTICAL drive and put it in my drive? I don't know if there are things maybe written to a ROM on the card and perhaps it might be keyed for ONLY the platters on this exact machine. There are probably very few Experts that can answer this question. Please do not reply unless you are POSITIVELY SURE that your answer is correct since I'm trying to save the data on the drive.