Mary A.

I have a casio keyboard CTK 2100 that I had not been using for over a year and prior I had bought an adapter to replace the batteries. It would charge my keyboard perfectly and I didn't need to use batteries anymore. Now however I have realized that it will only power on if my keyboard is connected to the actual adapter chord. Other than that it will not power on at all after supposedly being charged for a period of time. Could it be an issue with the adapter ?