Quoted from Gorno:My SRC6 is not factory and has been replaced by some sort of resistor/capacitor rats nest.
As long as it is built correctly, using discrete components is fine. Does it look like this? Send a photo.dernet2.jpg
It could be a shorted switch or diode on the playfield elsewhere (it actually sounds like that outhole kicker switch could be related, so I would tackle that one first. I would first replace the diode, then replace the switch if no other wiring short is visible)
I had random tilts when I aquired my Tomcat and it turned out to be a Tomcat target shorting. If a transistor were failing, you would usually get a whole row or column failing the switch test, so I would put that at the bottom of my list of suspects.