I have recently rescued a LAH that was sitting in my dads car port that hasnt been working for over 10 years. Slowly i have been fixing it up, but now ive hit a dead end and im not sure how to fix the last few problems, so if anyone can give me some insight it would be greatly appreciated!

The Trigger to launch the ball always adds another player to the game and by the time you get to the 3rd ball it resets the game. 2 people have a quick look at the problem, one tells me there is a wiring problem, the other tells me its a board problem.

The Ripper shot no longer works. it did for the first 2 games, but seemed weak and then stopped. i replaced the shot thinking it was just old and worn out, but still doesnt work. i havent looked into this problem any further as of yet.

Magnets dont work. i have checked the fuses and replaced the 3 triodes in the heat sinks, but still nothing. Could it be the magnets themselves that are not working?

Any info or ideas that anyone has on these problems would be very helpful, thanks!

Switch test mode doesnt show me any problems when i push the switches individually, but when i activate the launch trigger (8) and shooter lane (16) it seems to activate the Plumb tilt, 4th coin, credit button, right coin, center coin, left coin. (switches 1, 2, 3, 4, 5, 6) ive also found that when i hit the right flipper (64) and the shooter lane (16) it activates the Scoop Spinner (59), but while playing a game it can also activate middle right scoop (58) and Smart Missile (62). My old man has taken the coin mechanism out to use in another machine, that shouldnt be causing any problems though right?

As for the magnet board are you able to provide a link for one just so i can make sure i get the right one?

Thanks to everyones help ive been able to fix the switch matrix problem and have made progress to the magnets and ripper not working. What ive discovered now is that whenever i replace a fuse to get either the magnets or the ripper working, that once its used it blows a fuse somewhere else. eg. replacing a magnet fuse causes a ripper fuse to blow and vise versa.
Any more info as to why this is the case?

2 diodes were no good and 2 switches were wired the wrong way around

Magnets and ripper both working together now, got a new magnet board since ive seen from multiple places that the original is pretty crap. thats done the trick!
Thanks everyone for your help!!!