Korg Poly800/EX800 Users

"Is eprom labeled 840206 the correct one for ex800?"

Yes, it definitely is the correct EPROM for an EX-800.

When you say, "it still did not work", does that means blank displays?
Or no switch/keypad actions? Or no MIDI response and no sounds?

/Mike
On Fri, 2019-06-07 at 23:43 -0700, studio_1a@hotmail.com [korgpolyex]
wrote:
> Well after installing the newly programmed eprom it still did not
> work, but strangely enough it works fine with a Poly-800 eprom. I
> found another version of ex800 eprom, will try that tomorrow. I
> wonder if eprom labeled 840206 is correct one for ex800? 
> 
>