Yamaha CP30 digital piano constant audio noise
Hello. I have an old Yamaha CP30 digital piano with the following problem: With at least one tone selected, and the volume turn up above middle position, can be noted at the audio outputs a constant signal as all the keys were pressed down.
This signal is affected by tone sellection and EQ and tremolo settings.
Any help will be appreciated.
Best regards.
José.
Portugal
Music - Yamaha