hey there can you do me a few favors?

1. can you take a picture of the offending area,   area where the A/D is /  Speaker Amp,  Caps etc

2. can you possibly record what that popping sounds like?

3. can you with a meter tell me the Readings from your psu rails?   -5, +5, +12

4. does the A/D I/C there in the corner ever get hot? or even noticeably warm?

Thanks!

its odd that it works fine for couple months and then starts acting up.

I have had issues with Color Classic and some issues the kind of align with your issues there.

but usually it will show up with in the 2 hour burn in.  I'v had to replace the A/D before, especially once they start getting warm or even nuclear hot.

(i think the cap goo can cause irrversable issues with this I/C) just like the UE8 Issue with the SE/30.