2015 thor Ace, generator runs but no power coming into RV
I recently replaced the fuel pump, oil, fan filter and spark plug on my Onan4000 bc it stopped running from sitting idle for a few months. Generator starts right up , but now I'm not getting any power inside the RV. I've gone over all the breakers (on the panel , battery bank and on the generator) checked all fuses and connections , found the ATS which seems to be in good condition (nothing burned or stuck). The gfci is stuck in the test setting, won't reset but I'm assuming it's from no power being present. This model does not have a plug to complete the circuit as some of the newer models have. Is there any fuse or hidden breaker somewhere that I'm missing? Thank you in advance Matt