I have a problem with a Black Pyramid. Self-test positions 16 and 17 are both read as 03. Game Play: After have made a first replay by High Score or Special, a second one (and so on) will not be given, but an extra ball instead. It seems that the MPU board is good - I changed all the socketed chips but no difference. I tested too another Software Chipset.
Does anyone have an idea what this could be?
Greetings from Markus