Any Luck?
I dont know how yours is wired or if this will help. Ours, not an AF, has in line thermal breakers, they are mounted on the floor under kitchen sink. But our battery box is directly on other side. However they are supposed to be self resetting, they can fail. Not likely & doesnt sound like your issue, just option.
I also have one for slide and a pair for jacks (non remote) as neither go thru converter and wired direct to battery as RoyB described.
Agree it does sound like if most works on gen then I wouldnt think converter (short of fuses), something between it and battery. Unless someone has definitive answer where to look on your AF Id also start tracing from battery as Forrest said. Curious also as I find the jacks able to take down entire 12v to converter puzzling.