Hello

Lionel 6-28273     SD 40 Diesel    circa 2007.

This engine has the older modular boards.  I had to replace the Radio Board and all works well now.

However, I lost the brake squeal.  Seems to be the only feature that disappeared.

I tried a second Radio Board and re-seated all boards.   I also completed all resets.   No change.

Can anyone help me to understand this oddity?

Thanks

Dave

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