Just read Lewis W.'s thread about frying his Proto 1 boards. Coincidentally I have a similar tale from earlier today. Ran a Proto 1 engine around the tracks for a while with no problem. Suddenly it stopped, shorting out the transformer. Saw small whips of smoke coming from the area around the underside of the frame near the front trucks. Detected a sort of burnt metallic smell.
I took the shell off to see what I could find. Removed the front can motor, disconnected the lights, poked around some more. Did not see any foreign matter in the wheels, gears or rollers. Didn't see anything that obviously looked burnt -- although I'm not sure what that would look like anyway. Put everything back in order best I could, reattached the shell and put it back on the track. Now it runs forward and reverse, but there's a buzzing sound whenever the voltage level is raised. It almost sounds like an old E-unit from a postwar engine but not quite that loud. Anyone have any ideas what might be the cause? If the boards had been fried, it wouldn't be running now, would it?
