Gday 48.
I noticed this comment in Marvin's guide
"The sound portion of the sound card is built-in to the system9 CPU board (and the CPU 2764 or 27128 at U49 position is used for the sound ROM). " ...
so just wondering is that CPU at U49 socketed ?? if so.. have you tried reseating it ? .. are the legs on it corroded ?
