2007 Fleetwood Bounder 32K electrical issue

I also have a 2007 Fleetwood bounder and have the same intellitec syt. as you and have had to replace the circuit board on it but I don't think that's your problem 50 amp shore power and generator go thru the intellitec the same way so I don't think that's your problem my gutt tells me that if you messed around with the 12 volt syt. that's where will your problem will be found recheak all your 12 volt fuse to see if that's your problem when replacing your batterys if you toched positive battery to ground it can blow fuses