Genny won't start a/ trying to turn on while on shore power.

I would first off like said make sure the battery disconnects are in the correct position. When you pushed the switch to start the gen. did you hear it try and start or was there no sound at all?

Start the engine and while its running try starting the gen. I could be wrong on this but I think the gen. gets started with the engine batteries not the house.

You may also want to go over to the Winnebago Owners forum for some good info also. https://www.winnieowners.com/forums