Despite batteries installed, RS still shuts off with power interruptions, and at shutdown.

Manufacturer’s product number - if possible - would probably help the Forum techies to help you.

Mark, is your D&H RS11 the one from around 2001-2003?

Do I assume correctly when you say no Legacy, that implies no Command at all (TMCC)?

Make sure your RUN/PGM Switch is in RUN

Make sure the SND/NO SND Switch is in SND

From what you have written, it appears you do have sounds, but they don't continue as they should when using a battery.

One thing you may check when you have the shell off, as you would to change the battery, is make sure the connector's leads have not become detached from the circuit board.

All switches are set to run. Thanks, David.

Those models have bog standard RS4 components, I can't imagine why the battery won't do the trick if it's properly connected and the socket is wired to the correct connections.

Had similar problem with err f3-7 board which turned out to be battery plug on circuit board had loose solder on one of the battery back up pins.A little heat with mysoldering gun with needle nose made connection good.Hope this was helpful.

@Nycfan posted:

Had similar problem with err f3-7 board which turned out to be battery plug on circuit board had loose solder on one of the battery back up pins.A little heat with mysoldering gun with needle nose made connection good.Hope this was helpful.

Thank you. Will look closer at the connections.

Did my suggestion help you?

NYC Fan - Sorry for failure of a timely response.

Followed your suggestion, traced battery wires back, no obvious breaks noted. Come to think about it, this is the second K-Lionel RS3 that did not respond to battery insertion. That one was returned to the seller, but not exclusively for failure of battery to prolong Railsounds.

My next step in diagnosing this issue would be to swap the RS4 board and the generic P/S board from a locomotive that has a working battery installation to see if the issue follows the boards or stays with the engine.  The RS4 boards don't have to be the same engine, or even diesel, what you're testing can be tested with almost any working RS4 board.