I did the same thing a few months back. I had allowed the drive's PCB to ground on the Amiga's shield. Checking the PCB, I couldn't find any burns or any place where the magic smoke might have escaped so I finally gave up and just replaced the dead drive with a PC drive that I modified for Amiga use. Takes about about 15 minutes as long as you pick one of the very easy to modify PC drives. I just had to solder a jumper wire, move an SMD resistor and and cut a trace.
could you give a link to details of how to do this
