OLIVETTI SUMMA 19 Hector Sottsass 1970 Vintage Calculator Adding Machine As Is

OLIVETTI SUMMA 19 Hector Sottsass 1970 Vintage Calculator FOR PARTS/REPAIR It was working then I pushed a button and it stopped and locked up. It probably something simple. For parts or possible repair. When unit is plugged in, there is a humming noise from the motor, but nothing functions. All of the buttons are locked into place likely from whatever is wrong with it. Cosmetic scuffs on the exterior. Overall very clean. Please see photos!