WHERE HAS ALL MY POWER GONE

Well yesterday I did more testing on ac panel and all breakers have 120v nothing is dead in there so I'am figuring it has to do with inverter so a call will go out to my tech.guy. This is probably simple but out of range for me. I belive all the outlets that are dead all are tied into inverter( TV and VCR, and two GFIs one in front lower compartment the other in bath). The wirring diag. from Newmar does not show two GFI and does not match what I'am looking at they show more 120 outlets and switches.The inverter is in lower compartment and input was plugged into that GFI which is dead.The inverter company is telling me the inverter should be set up in it's own panel with breakers but I have owned this coach for 5 yrs. and I no of no other panel.There are a few junction Box with multi. wires which all seem to be hot but that is with the buzz tester and I don't want to try and pull all wires out as I'am no expert by far. A PHONE CALL IS GOING OUT!!!!!!!!!!!!!!!!!!!!Tired of thinking about this.:?