I just upgraded from an Atlas Master DCC system to the Lenz Set 90. When I first powered up, I had 5 locomotives sitting on the tracks. One took off like a rocket in reverse and the others just sat still. I tried getting control of the rocket to no avail. Then I tried accessing the others - no luck - they don't respond. It seemed that all of the locos on the tracks during that first powerup had their decoders blown, while anything sitting on the shelf was fine.
That initial assessment has just been revised. I just tried running a locomotive from the shelf - as soon as I set it on the tracks, it took off in reverse like a bat out of Hades.
What seems to be the common thread - the ones that work are P2K locos with Tony's decoders. The ones that don't are modified Athearns with Digitrax DH21 decoders. All of them worked fine on the Atlas system.
Any thoughts on what's going on here and how I fix it?