Lionel SD90MAC Speaker Humming

Hello everyone,

I have two Lionel Lionmaster CP SD90MACs and one of them has a humming that starts as soon as the engine is getting power. The other one is quiet until the railsounds start up effects begin. Has anyone had this issue or have any tips I could try to fix it?

Thanks,

Jay in Ottawa

11/16/1211:44 AM

Original Post

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