Disklavier

Believe you are right. Tech guy was here today and between him and Yamaha support it was determined that one of those boards is not working properly, but they are not sure which one. So both boards have been ordered and, hopefully, that will solve the problem.
Will let you know when it gets fixed, presuming the board/s replacement gets my piano working again. I unfortunately will be out of the country until the 25th, so will not know anything further until the week of January 27th.