Quote:
Originally Posted by Daedalus
If yours specifically requires 12V, then it doesn't do anything with that rail at all - it simply passes it directly to the Amiga, which then uses it directly for the audio circuitry.
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Analog audio part is decoupled by rudimentary RC filter (10 Ohm + 220nF + 22uF) and original PSU is also quite noisy...
Perhaps issue is -12V line as you already suggested...
Anyway multimeter (or perhaps scope could be better) to verify required voltage present is recommended.