After several go arounds with the dealer and TYM, the techs at TYM said that the code on the dash can be corrected by cutting a wire that is not needed for the new dash panel (which I have). The wire is part of the engine harness. I have not done this yet. Once I do, I'll report the outcome.
Update: After checking the fuses, everything seems fine, at least to me. The dealer now has the tractor in his shop.[/QU Did you get it fixed?