I got a FBClassic thats been causing me a little grief. Originally the game was scoring 10000 points repetitively upon game start. Not such a bad thing if your looking to get a high score I thought it could be scoring due to a sensitive switch that was activating from the vibration from the disk so I unplugged the disc. The fantom scoring persists? I went over every switch in the game and they all looked good. For some reason I couldn't get the service button to work to do a switch test so I was manually checking switches. Not sure how I managed to but I blew the playfield fuse checking switches. Interesting enough the fantom scoring ceased with the blown playfield fuse? While the fuse was blown I was able to start a game. With a blown pf fuse the game wouldn't spit out a ball but I was able to continue finger bangin the switches to test them. All the switches seemed fine. I replaced the blown fuse and fired up the game again. Now all seems fine? Started a game and no fantom scoring? I actually lit that game up I was somewhat perplexed as I never really fixed anything other then the playfield fuse. After finishing my game I decided to go into the switch test to see if anything would come up but the service button wasn't working? AHHHHHHHHHHHHHH!!!!! DAMN GAME!
So I tested the button with my meter and it was good. I reviewed the schematics and traced the red wire to connector J3 and checked for continuity and all good. Then I traced the yellow/red stripe wire to J2. Scratches his head..........
I came back around to the front of the game and noticed now for some weird reason my displays weren't registering/working but I could see a faint orange glow from the scores at the bottom of the displays? Still scratching head........
I never did anything other then pull the plastic covers off the connectors J2 and J3 and test some wires for continuity? I decided to try the service button again and now when I press it the displays come on and I can enter the service mode but when I take my finger off the displays turn off as well?? Is the service button and the displays somehow tied together? Not sure what to check from here? Other then no display the game starts and plays fine now with no fantom scoring. Any help with this would be greatly appreciated.

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Yes it is.

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So I never had much success with it other then I figured out that buy alligator clipping the service button to leads together I can make the display stay on and play a game? Seems kinda a back yard fix for now but works. Only prob is as long as I have it hot-wired the service button doesn't work. I've attached a pic.
As well switch 17(on the mini-playfield thingy you plunge onto) isn't working. I tested the switch with my meter and it seemed to operate as it should(opened and closed). I also checked for power at the switch and it was good, but the switch isn't registering?
The last thing is when I raise and lower the playfield during a game, the fantom scoring returns? The movement or vibration of raising the playfield seems to set it off? Thats when I started grabbing every switch and wiggling it to see if i could recreate the fantom scoring. When I grab the capacitor on the switch for the Wotan Mushroom Bumper the fantom scoring triggers? Prob best to replace the switch or could it be a bad diode? I already replaced the capacitor(thanks Vid) and the scoring still persists when I wiggle that switch?

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I found a couple switches that were stuck closed. One was a rollover switch that was causing most of the fantom scoring. The game is playing great now. I got it jacked right up on the back legs. Its playing hard and fast.
I still have the service button jumper together to keep the displays lit up. Is it possible the switch is no good?