![hello $.$](http://www.aussiepinball.com.au/Smileys/classic/hello.gif)
and
![welcome %)%](http://www.aussiepinball.com.au/Smileys/classic/welcome.gif)
to AP
![thumb ^^^](http://www.aussiepinball.com.au/Smileys/classic/thumb.gif)
Bally EMs - My favorite ! Sounds like the game has a stuck switch. Check all the playfield switches. The 100 point score is a dead giveaway. Usually, the other coils could be a 100 point chime coil. If you tilt the game, does the buzzing stop ?
Do you have schematics and can you read them ?