I have a "pre-production" MTH Railking 0-8-0 steam engine (30-1255-1) that according to the box which is marked up with sharpie type of magic marker it does not have PS2.0 electronics.
The engine was purchase a year or two ago and it's a great engine, runs great in conventional, smokes great, chuff sounds, etc...
Question is: I tried running it last night on at a clubhouse which is set up for DCS and the engine just didn't do anything, it didn't start up, didn't run, nothing. It looked completely dead but when I took it off the DCS enabled line (placed on a test track, with simple Lionel CW-80 power) it ran fine.
So, it runs conventionally fine when no DCS is connected, but when there is DCS connected it's dead in the water.
All my other "conventional" engines ran fine conventionally (Z-4000 power) and completely ignored the DCS, so this seems weird.
p.s. I did try to "add engine" via the DCS controller, just in case the magic marker notes were wrong, no engine found.