JP-8000 powers on but frozen

B

bussy233

Member
JP-8000 (1998 synth). turns on, lights up, but the screen is all solid light up pixels and nothing happens.

Before I bring it to a tech, what are some things maybe could fix it, like battery replacement? I've opened and done a few small synth repairs on random synths so I think I can pull this off if anyone has an idea? thanks.
 
bump. It's still just sitting there broke. I can't access anything such as a factory reset someone suggested. Someone suggested Check all the power supply voltages. It may be that the +5V to the CPU is not working.
With a multimeter? Should I post pictures of the insides and then you tell me what to do? ty
 
"I've fixed a Korg Mono/poly and two different guitar amps simply by opening them up and unplugging/replugging all the cables. Scratches the oxide off the contacts."
I'll try this ^. Factory reset doesn't work, I tried even though the display only ever shows solid pixels. I called the tech, he said try factory reset. He fixed other stuff wrong with it about a year before this problem happened, cost me almost as much as a nice used JP8K. I might have to sell this as-is. Shame this synth is such a classic but not worth fixing, I'd be better off probably selling as-is and then waiting for a good price for a used one. I might just have to sample the heck out of it and sell it before it craps out, and stick with newer more reliable hardware.
 
Last edited:
Did this happen after moving it around or was it sitting where it always does and just didn't boot up like it usually does? If it happened after a move I would check to make sure any chips are seated properly then check the cables the battery and then look for bulging or leaking capacitors.
 
You must log in or register to reply here.
Back
Top