Hi All.
I need a little help. I have a Lionel Lehigh Valley C420. I put a battery in the unit so that the sounds would not shut off when I changed directions. Yesterday, I ran the train with no problems, until I turned it off. The sounds wouldn't shut down. I let it go for 5 minutes, then I disconnected the battery. I tried it again and the same thing happened. Can anyone tell me what the problem is. And yes, I did try a new battery with the same results.
Thank you.
Bob
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I've heard of this before here, and the last guy sent it to Lionel. Obviously, that's not correct operation. 
Did you try doing a reset? Might help.
Just a thought, but is it possible that your transformer is still supplying a small voltage even when it is apparently 'Off'. Not enough voltage to cause anything else to function, but just enough to fool the locomotive's circuity into thinking that it is still powered. A simple way to check would be to either un-plug the transformer from the wall, or to disconnect the 'hot' lead from the transformer. Or you could remove the locomotive from the track and see if shuts down properly then.
This might be just one of my strange thoughts, but I have heard of transformers not completely cutting power.
Good thought Nicole, maybe this is a simple one. 
I would suspect even with the transformer possibly still supplying voltage it is not enough to power the sound boards.
But I suppose with the battery the circuit could be still active with the reduce voltage. Call Lionel.
I think that Nicole's thinking is that the low voltage just fools the shutdown circuit into thinking it's just a power interruption and not really a shutdown. It's simple to just take it off the tracks after removing power to see if that's the case.
I agree on one thing, I don't think this is a problem that you can fix yourself.
Sorry about the delay in answering, I'm at work right now. I believe that I am going to send it to Lionel for repair. In response to N.Q.D.Y. I don't believe it's the transformer causing the problem. If I remove the locomotive from the track, It will still run. Best bet is to let Lionel take a look at it.
Thanks to you all.
Bob
Sorry that my idea didn't pan out, but it was worth a try before shipping the locomotive back for repair. As John said, my thought was that a low voltage remaining in the track could have been just sufficient to prevent the shutdown logic from activating.
I'm sure that Lionel will fix it for you though.
Replace the RS Power board; 691RSPRA00. The "brown out" detection on the original has failed.
Also make certain the loco stays on the track once power is removed entirely.
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