From experience: check the inverter/converter, in my previous coach after an overload I had to replace the 2 20amp fuses on the unit. It was hidden in the kitchen cabinet next to the frig...found it by accident when I almost gave up. Also, two circuit breakers on the generator. If you think you know what your doing you can open the transfer switch and see if the contacts are being pulled into place. (my electrician friend did this when we were in Mexico and the power was too high to pass through the transfer switch). Good luck