Wineguard Pro Traveler Direct TV dish has been a disaster!

We were on vacation this summer our Winegard Direct TV HD dish failed with the notice "antenna comm failure"  We were told the dish was shot and had to order another one, at $2400 they don't come cheaply.  When the tech installed the new dish and box, it went up ok, locked in on the satellites but when we went to put it down, the box fried. You could smelt the  wires had overheated.  He ordered a new box and circuit board and after installation, that fried as well. Then Winegard sent him the entire new bottom thinking maybe a wire was pinched inside. We just installed that and again it won't work and the box smells friend. Our electrical system checks out with no problems but -but the tech has never seen anything like it. 3 bad parts exchanged and it still  won't work. He doesn't know what else to do? Has anybody had this difficulty lately with a Winguard Pro Traveler. It was ordered thru Camping World. Winguard has not tested the returned unit yet and we are waiting for them to get back to us.  Any help would be appreciated.