Cross-post from another forum about a sad and lonely JX-10 -
I've had a JX-10 sitting in my closet for years. It only half works. So, if the JX-10 is basically two JX-8p's, only one of the JX-8p's is functional. In 'stack' mode, it will work as a 6 voice synth across the length of the keyboard, but the second stacked voice is silent. In 12 voice polyphony mode, only every few keys will work. In split mode, one half of the keyboard is silent, and the other is fine.
This is the second one I've had like this, I returned the first one to the store I bought it from (which was an ordeal, but I digress). I got this one from craigslist and it worked fine when I bought it, but then the issue popped up again later and I just put in the closet. I don't really want it anymore, but it'd be nice to get it fully functioning again before I sell it, or at the very least figure out what's wrong with it.
Obviously only one of the voice boards is functioning, but if I open it up, everything looks normal and I'm not sure what I should be looking for. Anyone have any experience with this, ideas of what to look for or what it would take to get it fixed? I haven't been able to find anything on the web.