Yamaha CS80

Hi everybody CS80 users,

I recently got a short during calibration on the KAS board, which blew one of the PSU fuse, and created a low resistance in the system, which i could quickly solve by identifying and changing the corresponding damaged IC.So everything should be set to normal right now, all resistances are in the correct range but when i power up the unit, a constant sound plays, kinda detuned one.I can play notes on top of that sound, even though the notes played are not in tune neither, and somewhat hazardous depending on the preset used.Eveything else (tremolo, chorus, ring modulator, filters...) seem to work, but memory/user presets which produce no sound.

I suspected the fuses again, since this is close to what happened to one user recently here (and his fuses were off finally) but here, they are all ok.

Any suggestions to help focus my searches?

Thanks