Replacing boards is easy. Replacing components on the boards is hard.
My local shop told me a few years ago that he was very frustrated trying to repair lionel stuff. He said each run seems to have different boards and components, and the kicker, Lionel never seemed to have replacements for older ones. I think this might be true of other mfg but he was a Lionel repair shop. He said he could find the problems, but could not get the parts because they told him they no longer stocked them.
