Just keep turning on and off , and plug in and out the pedal....it will work, my piano student has the same issue like you with casio CDP-S100...everytime your sustain stuck, just keep on turning on and off and plug in and out the pedal...im sure it will go back and not stuck the sustain
(Solved) Casio cdp s-100 stuck on sustain with no reason
in Casio CDP Series
Posted
Just keep turning on and off , and plug in and out the pedal....it will work, my piano student has the same issue like you with casio CDP-S100...everytime your sustain stuck, just keep on turning on and off and plug in and out the pedal...im sure it will go back and not stuck the sustain