Chosen Solution
..I have the Yamaha PSR OR700 music arranger ..there is something like white noise ..when I turn on the device there is no this noise, ..the problem appears when I press any key, or choice any style or voice ..this problem begins when I open the device to clean up, but this is not the first time that I do it.. ..thanks for your time !
@martinlacetti since “this problem begins when I open the device to clean up” you want to open it up once more and ensure that all of your wiring etc. is properly seated. The “white noise” could be ground humming or a bad cap.
