I have a strange problem that I need so help on . So here what happened . I turned the machine on and started playing and it started going crazy when i hit the flipper buttons . I went into the switch test and all the switches on the machine work okay . Then I pulled the flippers up and here's what i see .

R flipper switch 22,14,06,46,38,30

L flipper switch 45, 37, 29, 21, 13, 05

I pretty sure I have a column issue on 1j10-5 and 1j10-3. I'm not really sure where to go from here .

I'm sorry just noticed that I also have a problem with column 1j10-2 !

okay one more 1j10-1. So now i know that I have issue with column 1j10-1 through 1j10-5 .

hmmmm .Has anyone had any problems like this ?

Well it seems that I'm on this thread all by myself . But just to jet everyone know that I found and corrected the problem . I isolated the problem to the cpu doing the jumper test . I finally traced it to Q43 transistor . I then tested the transistor and found that it was bad . replaced it and know everthing works great .

yep it feels great and learned something new in the process.

Thank you for sharing the link . I'm sure it will be very useful.