Hi all. Wondering if someone mind lend some advice on an issue I'm trying to track down with my Sega Baywatch. I'm having a problem with my ball trough switches or something connected. Often, during games, the most recent ball that drains will not register the rollover switch and it goes into ball search mode. Switch test reveals some wild info. Says switch 5 has a problem and then 1 and sometimes the rest of them.
I have manually tested the switches and they each work. I removed the green wires to them and tested each diode and all of those readings appear correct. 0.55-0.57 for each of them and 0 when reversed.
I've had some assistance in the Pinside messages and it sounds like I need to check all of the other switches on this row/column. Should I be looking on the CPU as well? I've read that Q54 transistor could be the culprit but I'm not sure how to test Q54, if so.
Any additional ideas would be helpful. Thank you.