Korg Poly800/EX800 Users

Check all of the keys and switches. Which ones work and which ones don't. Also, check all of the keyboard keys. Which ones work and which ones don't.
Write them out in a table and share it with us.
/Mike

      From: "andrey.koikto@... [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: korgpolyex@yahoogroups.com 
 Sent: Thursday, October 6, 2016 2:35 AM
 Subject: [korgpolyex] Re: stuck in sequencer mode
   
    Thank you, Mike, that was helpful for me also. I have almost the same issue: Poly800 frozen right after powering up with "1 50 01" display with no sound and reaction to any buttons or keys. Could you please tell me how to check if the IC33 is broken? 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