I bought a super clean Who Dunnit and I've been enjoying the heck out of it!
I was doing a general look over and noticed that one of top interlock switch was out of its metal bracket and was dangling free behind the bracket. Note that the game played fine when it was dangling off the bracket with the coin door closed. So I went and put the switch back into the bracket. Now when I close the coin door the flippers don't work, and when I open the coin door the flippers work. So I'm assuming that someone bypassed the interlock and the interlock allowed the game to play when it was dangling. So its all backwards.
What's the correct way to undo this? I tried to reading the schematic but couldn't find anything obvious. Sorry if this is a bit of a newbie question, but this is my first WPC game and these are so much more complex than the early solid state machines that I'm used to!