jornvango
Happy to try and help you get it fixed
However it's really bad timing for me
In less than an hour off for a week of camping/fishing
I assume you have a DVM, Soldering equipment and drills and know how to use them
If not the others are correct buy a new one
Get the converter out of the power center
Typically the converter has a metal case which is pop riveted on
You will need a drill to get the rivets off
Check the input side FETS, Mains filter and large caps
My guess you will easily see the damage
DigiKey is your best deal for the replacement parts
If really interested in fixing it send me a PM next week