Peculiar thing: when I start a multi-player game on a cold machine ['73 Gottlieb Hot Shot], after Player 1 loses first ball, it won't advance to player 2, but just gives a Player 1 Ball 1 again. This happens again once or twice after each drain, then finally goes to Player 2, and everything plays perfectly normal for the whole rest of the game. The trough ball switches appear to be fine, as far as I can tell. After I've played for maybe 20 minutes, the problem goes away, usually. Thanks for any insight.