I have the Kurzweil CUP2 model. It was working well and one day after I turned it on there was no display…on the control panel board ( there is always a “wellcome message” that is displayed on the board ) and no sound when pressing the piano keys.
There is a buzz sound , like always, after powering on the piano, which seems the power source is working.
I opened the back of the piano, checked all the cables, connectors, fuses and electrical components. Everything seems in place.
I don’t know what to do next. I need help and I would really appreciate your help. Thank you.