do you have a multi meter?
is your shore power cord in good condition ?
the plug is tight outercaseing is tight at plug ?
if you plug has a replacemnnt plug open it up and check black white to the copper color screem post white wire to silver screw post and green to green ground and no wires are lose and could touch another post .
you converter has a 3 position black switch battery
off and transformer. turn refigerator to off and un plug anthing plugged in inside.
place in off diconnect and dc battery
you might have installed .
take your muliti meter and set on resistance measure across the shore power plug if it is polarized on plug bigger then the other the small blade is hot wire , check from hot to ground plug if there is a reading you have a short. and will have to chase the wires look under driver side rear bench and look forward you can see the back of the inverter and wire get stored look for broken wire that might have been cut fiberglass is a very good a cutter.
oh yes door hinges the old ones i just took out where a postcards thickness to wearing thur the case the latch barley made contact inside the new trillium
site has the hinges in stock 90.95 hopefully thats canadian includinging shiping to virginia