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Does anyone have these issues with Bonanza Bros game?
- The player character doesn't laugh when picks up a treasure and enemy characters don't make sound when shot.
I have the exact same issue. Some files must be wrong?
I never experienced any sound issue. Probably 2 different problems.
LOL, I guess it wasn't "exact same issue!" Glad you got it working though.

@skusuma I would say do the mod if you have all the other issues, likely it will fix the sound too.
Mitsurugi-w fixed the rom board for me but I still have the sound issue.