Greetings. I have a PC2X I've been playing as my regular gigging rig for over 15 years, and it's been rock-solid, with great piano and Hammond sounds (which is 95% of what I use, with the occasional Wurli and Clav thrown in). But when I play it these days, it seems like the sound has deteriorated. The piano seems more grainy, less harmonic fullness, kind of flat-sounding. Same with the organ... grainy, not the sonic detail I remember it having. I'm wondering if there could be some electronic cause of this. It's the kind of thing, if there were tubes and capacitors, I'd suspect them as being old and worn out, but of course it doesn't. Has anyone else experienced this, or is there an electronic wizard who could suggest something I might look at? I have tried resetting it to factory specs/conditions, but that doesn't help. Thanks!