Thanks for the info,now that i know where to look i've found that the knocker is there but not connected, not sure why.
Often people find the noise annoying...
Also alot of the time the knockers can lock on, shorted tranny, and most people find it a nuisance to pull out the board and replace the tranny for a none essential part of game play so they disconnect it from the game..
I would say 8 times out of 10 the knocker is disconnected due to a shorted tranny.. That's the machines I've come across anyway....
