I have two 150gb Raptors that are identical in all the series numbers. The bad drive had been making a d-d-d-d-d-d-d kind of sound when it was getting the start command, but never spooling up completely. So I need some idea of what exactly I should replace. Everything except the platters? Is there a shit ton of parts in there? I've got the T8 torx head screwdriver that it takes.