I have a Yamaha CVP-405, and I’m experiencing an issue with the contact point.
When I turn on the piano, there is suddenly no sound. However, if I close the lid halfway, the sound comes back. I’ve noticed that the LED lights, which usually run from left to right, do not light up, but when I close the lid halfway, they light up again, and the sound returns.
When the lid is fully open, the sound suddenly disappears. Sometimes, the sound also disappears while I’m playing, and turning the piano on and off does not always resolve the issue.