I have an Atlas-O 3 rail SW Diesel with Lionel TMCC and Railsounds.
The engine no longer responds to TMCC control. When power is applied to the track and the TMCC Base is connected and powered, the engine comes on in Conventional and responds as it should in Conventional. Holding my hand over the cab where the antenna is located does not help. All of my other TMCC engines work properly in command mode.
I tried changing the R2LC board. No improvement.
Any suggestions as to how to restore TMCC control?