Thank you for the second opinions gentlemen. I have ordered a new R4LC08 board from ERR. After emailing Ken there, he assured me that the newer R4LC board is a direct plug and play replacement for my current board.
Ken is correct, the R4LC-08 should drop right in.
Thanks again everyone for all of the help.
I received the new R4LC-08 radio board yesterday that I ordered from ERR. Installed it in the locomotive, programmed it and everything is once again working great, including the reverse light on the tender.
We love success stories, glad it all worked out.
Congratulations, Erica Ann!!!