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I have a K-Line K3400-001CC Shay with no sounds at all. It does run forward and reverse. I'm not sure which of the four boards is the sound board.  Can it be replaced?  Nice engine and runs really well. Picture of the boards attached.

Thank you.


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Last edited by CraigP
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Swapping board to test and find out what is wrong.  You can move the Power Supply board and RS 4 board to a another Lionel RS 4 tender or engine that works and verify if the boards work or which is bad.  If boards are good it is wiring or speaker.  Once you figure out what does not work, you can repair it.  Power Supply boards are pretty common.  If it is the RS board with chips, you can swap chip and figure out if a chip is bad or the board itself.  G

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