I reinstalled the repaired panel last Saturday and it works perfectly! One of the things I'm doing now, to prolong the life of the display, is that I switch the breaker for the Microwave off when the trailer is stored. Before, I would periodically plug the trailer in during the winter to charge the batteries and the microwave display would try to come on with the temperature below zero. From what I've read, that's not good for the display. It's best to have the trailer up to a reasonable interior temperature before firing it up.
2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074