If it were a straight Microwave I would say no
But since it is a convection/microwave the answer is not as clear.
Remove it to the picnic table outside the RV
now inspect the thing,, Look for a fuse or reset button. IF you find none (I'll be surprised if you do) then...
Remove the outer cover CAREFUL there may be sharp edges the use of gloves (leather) when handling metal parts is highly recommended.
(Friend of mine read that warnign too late)
Again look for a fuse or breaker.
I have seen two of them where the only problem was a wore out fuse.. Fuses do wear out and blow for no good reason.
I have also seen burnt wires and blown diodes
And I have only worked on 4 Microwaves. (well 5 if you count the turntable motor in my DOMETIC by Lousy Goods (LG). (Replaced it with a GE part and now it works great).