It appears that your drive may have a shorted TVS diode on either the +5V or +12V supply. If there is no other damage, then you can simply remove this diode with flush cutters. The drive will work without it, but it will no longer have overvoltage protection on the affected supply rail, so be absolutely certain your power supply is good.
If you upload a detailed photo of your PCB, one of us will help you with a DIY repair, if feasible.
Otherwise, if you need to purchase a PCB, try the following vendor:
http://www.onepcbsolution.com/His price is US$40, plus $10 for a ROM transfer. The ROM transfer involves moving a serial EEPROM chip, or its contents, from patient to donor. This chip stores unique, drive specific "adaptive" data.