Quoted from jalpert:The button that ejects the puck activates a switch. When the puck goes into the "net," it activates a switch on the way down to the eject mech.
I'd break out your pin fixing skills and find what is probably a short or grounding issue etc.
The puck going into the net and the OHHHH sesnors are the magnet switches. The button for the boo is a physical leaf switch, so they could be grounding together as they are bundled running around the player guides and into the lower cab. Also if you have the early 90's board, could be some issues on the main board.
Do both boo buttons do it?
