Donkey kong 4 board set - some sounds work (digital/analog??)?)

Cartouche

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Donkey kong 4 board set - some sounds work (digital/analog??)?)

I'm having some sound issues with my Donkey Kong. 4 board version, with the Braze hi-score and DK II kit installed. Has worked fine for 2-3 years.

Sounds I do get:
a. "jump"-y sound when you first power up
b. Kong stomping
c. Mario walking and jumping


Sounds I DON'T get:
1. music loop at Braze start-up menu
2. music when Kong climbs up girders
3. Kong's "grin" buzz sound
4. background music during gameplay
5. hammer music, smashing barrel sounds
6. death spin sound

Which of these are digital, and which are analog?

While I play, there's a harsh scratchy sound coming from the speaker, not constant, but regular stopping and starting. Almost like a really scratched vinyl record, or crappy AM radio reception.

I pulled, cleaned, and re-seated the two 2716's and the 8035 on the sound board, 10k pot checks ok.

Aside from tight connections, anything else to pull & re-seat or check before I re-install?

Thanks,
Marc
 
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