Need help with a TMCC loco signal issue

Well, since you eliminated the antenna and R2LC, I'd be looking closely at the motherboard.

Does the transformer horn and/or bell control activate the sounds?

Thanks, John.  I was using the Cab2, I never thought of trying the horn and whistle buttons on the Z4000.  I will try tomorrow morning.

Just trying to find out if it's in conventional mode and not getting any serial data.

Found it.

The horn and bell buttons did activate the horn and bell but there is no movement.  After taking it apart, again, I found a bad solder joint.  Once I resoldered it we are functioning properly.

Thanks, John.

Sounds like a winner, I'm glad you got it sorted out.