Just re-read and now I'm confused. Things like a microwave and TV should not be on a GFCI circuit normally. They are only typically installed to protect wet locations such as near bathroom or kitchen sink and outside receptacles. I'm more inclined to thing you may have lost one leg of the 50 amp coming into the rig either at the pedestal or your cord or plug.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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