During skill shot selection you can hit the flippers to speed up the selection from left to right, then pull trigger to confirm, on my game all of the sudden on ball 1 half the time, rarley ball 2 or 3- you cant, left flipper works but doesnt move selection and when you hit the right flipper it launches the ball, game plays fine otherwise including lane change with both flippers except i noticed that if you pass video mode with the 25 mil the flippers dont energise until its almost to the flipper from the left popper if you choose video mode its fine right out of the popper, from my JD the cpu, fliptronics, and powerdriver swaped in one at a time no change, then the whole ribbon cable set with no change, switch tests are good, maybe my rom? Also checked flipper switches connections on my plugs and will do again when home, any ideas?

I have a mag board on right side, and a leaf switch on the left. They are registering properly in switch test and in game. I can try and unplug the mag board and see if it changes.

12v is dropped an isolated on the left side, leaf switch just closing ground side to the input

Hmmm thanks tim, i just went through a bunch of wiring and everything looks sound. So maybe a glitch in rom? I ordered a new one as swapping all the boards and ribbons didnt do squat, switch tests are fine, im not sure whats left to try

Ok i did some experimenting, on ball 1 with glass off- while its not letting me advance the left to right skill selection with the left flipper i reached in and pressed an upper lane change, pressing the left flipper changes the lanes and energizes the flipper, so the cpu is on some level acknowledging the button press while in the skill mode, changing lamp matrix data but not on the screen stuff, what could this be if ive swapped cpu's? Maybe a display board? Im very good with a meter but unskilled with a logic probe, any sttng experts out there have a clue what to check?

its been playing that way since i got it about 8 months ago. both lower and "upper" flipper inputs are tied together on one side of the contact, switch test shows both inputs activate just fine. im leaning away from that being an issue, input goes to ground and produces a switch closures just like an opto board, but the 12v is dropped and capped off. this problem just started. the mag board is a great lakes modular proximity switch board.

Right..... still confusing though becuase lane change is working, fliptronics has been changed out (headers and ribbons not the issue and board itself) fliptronics must be sending info to cpu/driver becuase i can make lane changes and move the shuttle in vid mode....

Thanks for input pinguy.

The right flipper will launch the ball if you have Adjustment A2. 16 (Flipper Plunger) turned on. It sounds to me like you want it to be off.

Its off, as i said usually ball one on 50% of the time for new game.

No i havent, but remember when this does happen the right flipper launches the ball even if left flipper is never pressed. Its extremely strange.

Mine seems good for many games then it acts like adjustment 2-16 is on for a few balls, then reverts back. When i do actually turn it on, only right flipper launches ball is that normal?

New cpu and rom new fliptronics still does it. Also swapes display driver with JD, not sure why the game thinks its on flipper plunger adjustment sometimes, so weird. Produces gun trigger error sometimes, switch is totally fine in test.