All of Clavinova Keys Not Working! No Sound.

by Naser
(Iran )

Hi dears,

I have a Yamaha psr a1000 keyboard from 2003 til now.
This is working perfect but recently some of keys don’t work properly and in this case, I opened the cases for clean&service rubber jacks.
After cleaning and finished the job, I recognized the any of clavinova haven’t operated. In reality, the clavinova not responding to cpu ....
Anyway, I kindly ask you for any experience for this subject and the solution about this...,,,,
Sincerely
Naser.B