My not often used TS12 is showing the follwing symptoms.
once turned on, all keys play fine, but E5 through to B5 (8 notes in all) are problematic.
Once in a while theyll play on startup but only after Ive played the notes a few times till they come good. then after some time they go dead and remain dead.
Any suggestions as to how to tackle the issue is much appreciated. reagrds Emmanuel