Did you replace the pins on the cable connectors, too?

With these Bally’s, it’s best to change both the male and female of each connector.

Please use Clay’s guide as a reference. It’s been awhile, but I think he talks about the importance of changing the connectors before doing much of anything else.

Since this has been going for some time, once you get the connectors completed, I would treat the machine as “unknown “ and work it that way. Check power supply by itself, then add in one board at a time, rechecking voltages each time. The step by step for this might be part of Clay’s guide, I don’t remember. Even though you have some new boards, these steps will help verify the problem location.

The round thing is a capacitor. Clip one side off (or desolder) and see if the problem goes away. It’s possible the capacitor is shorted.