@Steims posted:The pinched speaker wire only had an open and no short to ground. That would cause the sound board to fail? Seems like Lionel built their electronics more robust than that to handle various failures and faults.
I must ask the simple questions first. Did it how sound at one point? Everything else work fine in command as well as Conventional operations?
little advice, there are times a chip is defective from production and will show no outward signs. What ever board you are swapping too remember that of internal the “problem” could blow the test board.
the speaker wire was probably shorted and took the board with it, when you moved things to test you opened the short.
