Since the microwave worked the 120 vac is getting into the RV.
My guess is that you have a GFI that is off. You will probably find one in the bathroom and there may be others. If that is not the problem, check the circuit breakers. I have no idea where they are in your RV but in mine they are under the bed.
If that is not the problem you will probably more help in trouble shooting the problem.
Good luck
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