Joe, little can be done to fix a hard drive at home, without using special equipment. Most common failure are
Logic board (controller) failures.
Broken power/data connectors (requires fine soldering).
Spindle/arm driver chip failure which requires replacement of either a logic board, or a chip
Head block pre-amplification failure.
Moving parts failures.
Spindle bearing seizure or spindle motor failure.
Firmware corruption (requires special software and sometimes special connection arrangement).
The only thing I have ever successfully attempted was the logic board replacement. http://www.dataclinic.co.uk/hard-disk-fa... will give you a better idea of what is involved So I do not think this would be feasible unless you have the equipment and the skills required. Good luck