My Vector Bally pinball starts up fine; starting a new game is ok but all of a sudden the machine stops counting scores ; any switch doesn't make points ...even when the ball gets in the outhole I get no second ball . The only thing I can do is switch off the machine and restart again. Sometimes I can play until ball 3 but unexepectly the machines stops again . I checked all switches, solenoids, power supply ; new Eproms ....nothing helps

Kind regards

Patrick

_{Post edited by absocountry2 : title spelling fixed}

I found out that just 1 switch (rollover button for bonus ) locks up the game.Eventhough all switches work perfect in diagnostic . I already removed and rewired J2 for the switches.
Another issue now is that the start of a game is different now . The drop targets are activated
while they shoud not. I don't get a ball when starting (eventhough while there are 3 balls down )
Before it worked well ;I don't understand ...Is it due to the program ?

I put in another Bally MPU that works fine on my workbench (7 flashes ) but does strange things
in the machine . What else is there to check ? I already changes PIO , memory 5101

Hey,

I'll think I will start with replacing the IC sockets (U10/U11) as when I test with another mpu I get other issues. Then my "not working " rollover button contact does not stop the program. But I get other strange things such as the lights of the playfield behave like the machine is just powered on and now game is started yet . I don't think the female connectors are bad because when the game is on and I tried to wiggle the connectors ; nothing others happens

I think I will start to order new connectors and pins and replace everything on MPU and Lamp driver board