Picked up a Tri Zone recently, always liked the game. It has a column/row problem I can’t seem to solve. When the Z target is down, when the ball goes down the left inlane, targets reset. In switch test, the z target registers z target, target reset and inlane. Also, n target is dropped when z is also down, eject hole fires. Finally, when left kicker is triggered with z target down, play field tilt is triggered and game tilts. For that last one, I noticed someone disconnected 1 of the two white with red trace A rollover wires which stops it from tilting. I have checked wires on all those switches, diodes, swapped driver boards, I’m stumped? Is it a problem in the columns or rows? Both? Am I overlooking something? Any advice would be appreciated

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Anyone?

They are single drop targets, 4 separate ones. All 3 problems happen if and only if the “Z” target is down, which triggers the reset target switch.