Hi: After close inspection of the solder joints, found that one of "FO" pads on the decoder board did indeed have a cold solder joint. Thanks for putting me in this direction.
Herons
You're welcome! I'm just glad to hear that my advice and hunch was right and corrected the problem.
I've rarely had a problem with an NCE decoder, so I always look for another cause when someone is having trouble with one of them.