Like anything else in life, it is the little, simple things that screw you over royally! Adopting the attitude of "If I have a headache, it must be a brain tumor" the Geezers tackled the electrical problem by taking apart the converter box and trying to extract a circuit breaker! Failing at that, we tested the breakers with a continuity tester - OK that works... Follow the wires to the first outlet under the table... - Looks OK but continuity tester says there is a problem...HMMM?
OK - pull the outlet out of box and while doing so, discover that the outlet has a GFI breaker in it!!!! Push in the little button - BINGO - lights, camera and action!
KISS applies. (Keep It Simple, Stupid)