hi there,
I had recently bought the mod kit and everything works great but a native green cable on the board near the DC 9v insert (so nothing regarding the mod kit) was accidentally unplugged and I can't remember where to connect it (the synth doesn't power-on anymore).
have a look here (it's the green cable)
(http://s28.postimg.org/ap88brmy1/20140606_232814.jpg) (http://postimg.org/image/ap88brmy1/)
any help would be really, really appreciated.
thanks a lot!
I've never seen that on a Poly800. I don't think the green wire and the red jumper wire are original.
I'm guessing the green wire is to ground something in the top of the case. Try wiring it to a ground point on the small volume/power knob board.