Problem starting Onan 4K generator

I have a Class C Shasta with a Onan 4K generator. It is hooked to a remote start in the kitchen area. Yesterday, I wanted to run the generator to get some fresh gas through the lines. When we pressed the remote start, there was a loud pop-not quite a backfire. We could not determine exactly where it came from, but I do not think it was from the generator. After that, the remote start and the actual button on the generator would not do anything. I did check all the breakers on the power distribution panel, but nothing was happening there. Was hoping someone might have a suggestion of this happening before to someone and could point me in the right direction. I know enough to be dangerous-but was hoping to fix this myself instead of having to take a repair shop.

Thanks!