Okay, so i tested some more and there must be a issue with a diode or a problem with the board. Doctor 2 on the speakerpanel was working again playfield doctor 2 is not.
On every single lamp there is another one blinking. I checked everything under the playfield and it all looks fine. No broken wires or diodes.
I checked it the lamp matrix and attached image is what i found out. Row 2 was perfect. Every other row had double lights. Row 4 and 5 where exeptions to this.
Row 4 No.14 lighted No.84
Row 5 No.15 lighted No.25 after this every other lighted column 3.
So i think my problem lies in column 3 but i don't have a clue where too look next. I disconnected the 5x3 but the problem stays.
Does this mean i now have to desolder and check the diodes in column 3? What about the 5x3 board. How can i test that?
I hope someone can point me in the right direction.
Thanks in advance!