Have a newly acquired black rose machine that it having weird sound issues. Game starts fine, and the sounds all work, but about midway through a ball, the sound will go out or get stuck on one note. When the ball drains, it resets and is fine.
In test mode, all sounds work perfectly except for sound 10, which is end of video mode. It always trails off, but never ends, and then no other sounds will play in test mode until I restart it.
I reflowed pins and changed the ribbon cable. At this point, I'm thinking it's board related. I know that u9 is a common culprit, so I may replace that. Anyone have ideas on how to isolate such a problem?