1978 Sinbad Pin Ball worked great for 30 years. It started acting funny a few years ago. I had a certified repairman go through it to completely get it back in working order. Had a new Ni-Wumpf CPU installed,new Gottlieb System 1 power supply installed, new "S" cable, and changed bad pins. After all of these repairs, the pinball started to randomly tilt. There was no shaking or bumping of the machine. Tilting occurred with gentle play. It appeared that there may have been a problem with the slam tilt circuit so the CPU was sent back to Ni-Wumpf for testing. They put a scope on the board and looked for poor circuit function, degraded logic levels and edge sloppiness but everything looked perfect. They even put it in a Sinbad machine that they had at the shop and it worked perfectly. The suggestion they provided was that the problem was probably isolated to the game itself in wiring or connections. My repairman took the game back to his shop and the game would play fine for a few games and then would tilt for no reason. I want my Sinbad back. Any Suggestions?

Thanks,

Bob

Thank you for your advice.