Quoted from RGAires:Any way to know witch transistor on the node 8 is responsable for the right flipper?
You should be able to trace it fairly easy with an ohm meter. Turn the game off, clip one lead to the coil for the flipper and then start hitting the tab of each transistor on the node board. If you use diode test or other audible alert for 0 ohms it will make it a little easier.