Opening up an RD54 Disk

I beleive the medical profession agree to 'first do no harm', and I think we should follow the same principle. Yes, it's a non-working drive, but that could be due to a lot of things. If the faultr is on the logic board, it may be able to be fixed (there are custom ICs there, there are also a lot od standard parts). But if you open up the HDA, you are going to have a headcrash fairly soon afterwards (unless you happen to have a cleanroom...). It's best ot avoid opening HDAs unless you know you hve to. I know I'd have done a lot more tests on the electronics befroe removing that cover. On the otehr hand, if you've undone the screws roufn the outside and freed the gasket, you've let conaminants in anyway (5 micros is small, it doesn't take much a of a gap to let such particles in!), so you migth was well go the full way and take the top off. -tony