Korg Poly800/EX800 Users

I had a similar problem once before. It was an extremely corroded sequencer enable switch.
Don B.

From: zwright88@... [korgpolyex] 
Sent: Thursday, July 26, 2018 2:33 PM
To: korgpolyex@yahoogroups.com 
Subject: [korgpolyex] Strange 800 problem: locked up, display error

  

Hi folks,




I have a Poly 800 mk1 that has developed an odd problem. 




Upon switching it on, the display reads "1.7 50 01", no sound is able to be produced other than the occasional low frequency click, and none of the buttons are responsive at all. Playing keys will oddly make the value number displayed gradually increase, but the first two numbers remain at "1.7 50"




I'm not able to attempt to re-write the patches from tape since buttons and rear switches are unresponsive, so guessing this is a more serious problem. 



Anyone experienced this before? I found only one mention of someone with the same problem online, but there was no answer. Thanks!