The contact owns a 2020 Forest River Sandpiper. The contact stated that the interior lights would flicker on and off. The contact also stated that they detected a burning odor and was relating it to the converter box and the fuse box shorting out not allowing electrical components to function in the vehicle. The contact stated no warning light was illuminated. The vehicle was not taken to the local dealer nor independent mechanic to be diagnosed or repaired. The manufacturer had been informed of the failure and informed the contact that they could not assist. The failure mileage was unknown.