I will fix this pin even if it has to kill me in the process... 

I think the problem is Vari target related... so here's how it goes..

1. Switch machine on at power outlet
2. Kick start it by hitting s relay
3. move the vari target so it clicks
4. That lets me fire the ball
5. Ball is fired and have to hit the vari taget again so the firing coil goes back to normal position and stops buzzing.
6. While ball is in play flick a vari-target with my finger and everything starts to score points (at least everything else works)
7. After a while no points are scored with any shot so i flick the vari target again
8. Start scoring points again.

I mean WTF?

Grrrrrrrrrrrrrrrr.

Anyway i carefully bent the innermost switch on 1c which hasnt seemed to help in anyway.

The wire colours from that switch are purple and what looks like white with light blue stripes. arrrrrggghhhhhh its kiing me to be so close and yet so far