Thanks for the contributions everyone.
Up to this point, I've only been able to tackle one engine's issues so far - the O-5.
I can provide that the board is an R2LC08. Engine/tender do not look like they have been modified.
As far as reprogramming - I've done what I've found so far: Engine in program mode <Engine ID> <SET>...<Engine ID> <AUX 1> <4> <SET>. Have also tried <8> instead of <4> - no joy.
Photos of the tender disassembled are provided, for what they may be worth.
In short, nothing appears to be disconnected, or wiring severed. You are all smarter than me on these issues, but I'm wondering about the antenna issue theorized - all the other signals are received and acted upon (whistle, coupler, direction, smoke). It's only the movement that won't work.
I'd perhaps be curious to hear more about the tach theory. I disassembled the locomotive and could see that the motor tach strip are all in place. I could see the sensor that looks at the tach strip. But visual is all I could do. Not sure how to go about testing that particular functionality.
