hi justinL3
welcome to the forums....
great first question...but man i hate what happened.
you aren't the first to do this...or the last.
normally shore power via the converter will send power to the tow vehicle via the 7 pin...and even charge the tv battery!
so you are correct to be concerned, although if the tv is sending any juice into the trailer...it's
12 volt.
i agree with laurab...disconnect the converter. if you cannot figure this out looking. call the dealer or factory.
another option...and i don't know if this if viable or not...
does your tv have a 4 pin and 7 pin connector? mine does and i think using the 4 pin via a 4-7 adapter will still give ya trailer brakes and marker lights...
anyway you really should call either a competent dealer service shop or tech support in j/c....
of course you will need to tell them the truth...
they have seen this before and jack is right other 110 boards may be cooked.
the parallax is only 2-300 bucks...who knows what else you need....
cheers
2air'