Casio PT-31 is switch on sometimes, I press the buttons and doesn't do nothing, was working before, baterry cover is missing. Casio PT-22 before doesn't switch on before but now I cleaned and is working, only the 2 buttons doesn't working, CLEAR AND DELETE, I press on the and doesn't do nothing, maybe is working, I don't know how to used, I tested both with few not original power supply and doesn't working. can be used with battery, White one is clean. ONLY FOR PARTS OR REPAIRS, NO RETURN, U BUYING ONLY FOR PARTS OR REPAIRS ON YOUR RISK. White one is open little bit on the edge.black casio missing small plastic from the button,check pictures before buying, both have sign of used.
