The autopilot that wasn't...

Our autopilot has lost its mind. It's a rather dated Autohelm7000 unit that worked perfectly until two weeks ago. The drive motor is good, the compass/gyro are good, but the "brains" of the system seem to have failed. My options are to either buy and install an entirely new autopilot, or send the faulty computer back to Raymarine in the hopes that it can be repaired. A new autopilot would be really nice, but I'd rather not spend that kind of money. Soooo... I'm sending in the faulty unit and hoping for the best. Anyone out there have a used AH7000 they want to get rid of?