I have an old casio casitone CT-310 Rating: DC 9V 8.5W Battery 1.5V x 6 or AC adaptor AD-5
I'm looking around the house for a power supply to use. I found the following: Output: 9V DC 200mA from a hand held mini vacuum cleaner charging base.
so the keyboard must demand about 945mA (8.5W / 9V) but the supply delivers only 200mA correct? What will happen if I try to use it? will it be very quiet? or do nothing? or get damaged?