[LGB333$$$$]

Hi all, I have a 2219s LGB Pennsylvania mogul that recently stopped making the chugging sound when running. The only sounds that work are the hissing and bell/whistle sound that it makes when running over a magnet. I thought replacing the 9v battery in the tender would fix it, but that method didn’t work.
Would really appreciate any solutions or troubleshooting methods. Thank you! View attachment 63567

Wondering if you were able to identify what the non-chuff sounds issue is on your Mogul?