After more than 10 years my emu 1820m started to play noise when i tried to play music. Sounded like “white noise” and 15 minutes after every boot the noise seem to be disappeared.
When I dissasembled the dock unit I realized 2 buggy capacitors, and replaced it with 680uF 25V caps (bought from local electronics store). After replacement the noise disappeared immediately:
I also realized another buggy capacitors in outputs/inputs pcb. I didn’t hear that it would affect the sound, but they didn’t look good:
Replaced these 12 cap with same branded Jamicon 470uF 6,3V capacitors (bought from ebay):