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There are several built in micro computers involved, is any of that in your skill sets, would you be able to follow coaching instructions on the electrical circuits? or are you hoping to find a simple button you can push? there are no simple fixes for that unit.
Even finding service for it many parts of the country can be a major problem.
If you want coaching or guidance to a qualified service outfit tell me which direction you are from the center of the nearest city and will see what I can do for the upgraded price I have sent you.