I attempted a platter swap on 2.5 250GB toshiba. It was a practice, so my plan was to take platter out, put back in, not a true swap. In the end, I broke the drive, it clicks and does not id in mhdd.
well it's not scratching at least.
Here was my procedure.
1. unscrew top / enclosure.
2. use packaging tape to tape center of disk part to edge of drive. This is so it doesn't spin, so I can unscrew the center of platter screw.
3. unscrew screw at center of platter, then un-tape. metal bracket comes off stuck to tape.
4. unscrew the screw that hold plastic ramp in place. move ramp as far as it will go, a few millimeters, so that disk is unobstructed.
5. turn upside-down, dump disk onto paper. I made it soft underneath to cushion impact.
6. flip disk over using another piece of paper on top so the disk is back to top-side up.
7. slide disk from paper back onto drive. bumped edges a bit.
8. screw platter bracket back in, move ramp into place, screw that back in also.
That's basically it. I did make at least one mistake (probably many depends what you consider a mistake

). the first time I plugged drive in after completing procedure it did not spin up and made a rapid click-click sound. I took off cover and went to investigate.
It turned out that the the lower arm that extends to the lower head which reads the underside of the disk, was out of place. While the heads on the ramp were correct, the lower arm was actually bent above the platter. This made it so the arm was immobile. not really bent though. I gave it a tap and it flexed below the platter. then the arm was mobile.
So now the disk spins up and I get the clicking sound like the arm is swinging around and does not know where to go.
I REALLY think the heads are fine because they were on the plastic track the entire time. I'd like any comments or insights. I could take pictures. I don't really know much on the technical aspect, but I'd like to get this procedure down, so I can fix my laptop drive with a dead motor.
might open it back up and take a look tomorrow. can't put to waste the drive just yet.