Help...

I’m taking a shot in the dark here because I’m not sure what you are describing and what you have already checked. But if your RV is plugged into a pedestal and you have no power in the RV, it could be your power cord. While plugged into the pedestal, use a multimeter and check the voltage at the breaker panel on the ends of all 3 (4?) legs of the power cord (or at the transfer switch if you have one and find it).