> To late for my JX. First, every 8th (or was it 12th?) keys was
It doesn't sound like an empty battery, anyway, I would replace the
It also doesn't sound like broken oscillators or filters.
Dunno if some special Roland chip manages the routing and controls.
> I got my first one back in 1987 and the last one 3 years ago.
You don't own another borked JX anymore? With two of the same or similar
boards you might be able to repair one of them yourself or let it repair
one, for less money.
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