My recently acquired Pinbot is missing segment p on the alpha numeric displays. I replaced a resistor on the display board that looked rough (even though it measured in the proper range). It has had u13 and u14 socketed in. It looked like one controlled one half of the segments and the other the other half based on the schematics. I switched them, thinking if that chip were bad it would cause another segment to go out. However still only missing segment p. I also measured the resistor in line with that chip and segment p. It measured correctly as well.
This is where my ability to trouble shoot has ended lol. I know the information for the alpha displays comes from the mpu. But I don’t know where. The mpu had some older acid but has been cleaned up and the game is functional. I’m just looking for some fresh ideas on where to go next. I want to get the game 100% functional before I shop it out. I appreciate any help