[travelin texans]

If its receiving "120 volts of input power" I'm guessing you're referring to you "converter" not inverter. Also not sure what display you may be looking at.
Your converter uses 120 volts AC to provide 12 volt DC power for lights, furnace fan, fridge & water heater controls & charge your batteries.
An inverter uses 12 volt DC from your batteries to provide 120 volt AC to items such as a residential fridge & possibly a couple plugs.
Check the fuses at the converter, use a voltmeter to confirm 120 volt at the converter.
If you don't have a surge protector/EMS, either hardwired or portable, connected to incoming shore power, you need one ASAP and to protect all the electronic equipment onboard.