Ok big day today. Went through wiring on back boards and put in any loose connected wires. As a result the ball eject coil  now  works:) This means i can now get a game going.

I also rewired the lights on the back which were  a mess as only one light worked. They  now all work except a few flashers so i will continue to investigate. Might have wired some parts wrong.

Still have that issue  with fuse f1 blowing. Still need to get that sorted.