My AP24 has stopped working and I need someone to troubleshoot it. Tried resetting it and then re-calibrating, but can't get it working. Makes me think there may be a bigger issue that needs fixing. Boat is on a lift in the OCMD and readily accessible. I'd prefer to have someone mobile work on it, but worst case I can also put the boat on a trailer and drop it off somewhere. Anyone have any suggestions on who to contact?