Hi akflyman,
Are you talking about the inverter (12V DC ---> 120V AC) that powers the residential refrigerator while towing? If so, it supplies power through a GFCI outlet. If it tripped, you can reset it by first turning the inverter ON, and then pressing the reset button. The on/off switch and GFCI buttons are on the bottom and the inverter is in the front compartment.
If you're talking about the Power Converter (120V AC ---> 12V DC) that keeps the battery charged and helps power the lights when on shore power, it's usually behind the rear wall of the pass through basement storage. Its plug could have vibrated out of the outlet, in which case you should tie it down after replugging. It also has 3 on-board fuses that can be blown by connecting your battery with reverse polarity for even a split second.