Tonight while running trains. I noticed that my GP38's lights began to flicker. Then I saw smoke coming out of my digitrax dcs50 command station. I unplugged the power supply as quickly as I could. The zephyr is under warranty. My question is what could cause this to happen? Could there be a problem with the loco, track, or is the command station just gone bad? I would have thought that the zephyr would have cut itself off before getting fried. I was running one loco at the time it happened. I will get it repaired or replaced, but what caused it? Does anyone have any ideas on what to check?