I had the same issue on our 2018 Chateau. With the issue of the switch not turning the power on, I found out that the battery had run down. Then , I found out that I had hit the switch one time when the shore power was plugged in and had gotten the power "out of sequence". The way to check if it is just that. Unplug Shore power, Turn off Coach battery. Turn coach battery back on and leave on when plugging in shore battery. This worked with mine. I found out the issue with the battery run down when I could not switch on the power, so I started the unit and after a couple of minutes, I could switch the power on. Good Luck!
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