first, you have two different electrical systems, 110vAC and 12vDC.
your outlets and microwave ONLY work when you're plugged into shore power.
your lights and slideout work on battery power.
your fridge will work on both but you have to change the fridge button to AC or DC. if you still have it set on battery power, then it won't work if the battery is dead.
second, either your battery is dead or the charger part of your converter is bad.
or the resettable 12v breaker along the trailer tongue, is tripped. this usually happens when someone crosses the battery wires and trips the breaker, usually when re-installing the battery.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC