I've developed a new problem with my S-Gauge Berkshire number 1225 from the 6-49632 Polar Express FlyerChief RTR set purchased in 2016. The chuff sound quit working. It will make one chuff sound when stopping the engine, and one chuff sound when starting it in either direction, but nothing when running. Is this a sound board problem (unavailable), or could it be a different cause which could be repairable?
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