I still cannot get my grandson's MTH SD70 ACe to respond to control by the DCS Remote Commander. I have tried several things suggested by this forum (and they are all appreciated) but no luck. After it would not work using the Lionel CW-80 transformer for power directly to the track, I bought a Z-500 Power Brick. Per instructions I connected the brick to the receiver and the receiver to the track, disconnecting the CW-80 from the track. When the brick was powered, the SD70 did not respond to any control inputs and remained silent. The other locomotive, a Lionel engine with a remote control, responded to its remote control. The SD70 was standing next to the DCS Remote Commander Receiver. I switched to SD70 switch from DCS to DCC and tried again. With power to the brick, the SD70 immediately started but would not respond to remote commands. From the suggestions I have received it sounds like I need the SD70 control set to factory settings. I'm thinking I may have changed something when I was using the buttons on the CW-80 (when we were running in the conventional mode) to get the couplers on the engine to remotely open. A lot of various and numerous button pushes are required to activate this function. May have done something wrong here; never could get it to work.
My big problem is we live in Albuquerque and all the model railroad hobby shops have gone out of business and I don't know how to get the SD70 re-set. There is a model railroad show later this month that I will try to attend and see if I can find out anything.