I have a problem with a proto 2 early MTH F3 A-B-A set. The two A units are powered and the B unit is a dummy. Today while running trains I had a derailment with one of my trains on the layout so I pushed the emergency stop button on the hand held controller to kill the power. After restarting everything I noticed that the trailing A unit was stuck in conventional mode and would only run in reverse. It does not respond to commands from the lead unit or DCS controls. The lead A unit still runs fine by itself and responds to all DCS commands. However when I put the two together again and power up the track, the slave unit starts to run in reverse while the lead unit is still in neutral. I can't do any resets because the slave unit will not go into neutral. I assume that the reversing command comes from the lead unit. Apparently the trailing unit has no way to go to either neutral or reverse by itself. Hoping this is not a board problem. BTW, the battery is OK according to the message on the controller.
Ray