Korg Poly800/EX800 Users

Hi Poly fans,

When I send the sysex data dump request string (F0 42 21 01 10 F7) to
my EX800, it responds by sending out the full sysex dump as expected
but then I get a blank screen and I have to power cycle the unit to
get the display back on again.

Is that normal behavior that you all experience with your EX800's?

Cheers,

Mike H