Gottlieb Bone Busters Inc. (Gottlieb, 1989) Gottlieb 80 B ?

[Graves]

I have a bone busters pinball . The problem is I keep blowing my switch matrix I send the board out for repair get it back plug it in ,feeds one ball and plays for 5 sec and bam into attract mode . I go to book keeping all switches open only a select few will show closed when I close them. Is there any way to narrow down the problem by what switches work and don't , also I get only the talking sound no back ground music . I put a new micro switch in the out hole but I don't see how that could be the problem it's just completing the circuit with the ball there .the other thing I did was a new flipper coil I don't think I wired it wrong it's not controlled though.
Thanks

 

[pinballdaveh]

did these problems start after you changed the switch and coil? write down all the switches that dont work on self test and check those switch wirings for shorts to another device. if you have a schematic or manual check switch matrix diagram to see if non working switches are all in one row or column. sound problem may or may not be related to this problem.