Electronic Musical Instruments
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Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I suggest that you need to try a reset of your keyboard, first.
Turn it Off. Wait 2 minutes or longer.
Then, hold down the B-1 key (second to the left-most white key on the keyboard.) And turn it On while holding down that key.
If that doesn't work, then turn it Off again, wait a bit, and try holding down the A-1, B-1, and C-0 keys (the three left-most white keys of the keyboard.) And turn it On while holding those three keys down.
If those resets don't work or affect the situation, then let me know... I will have other suggestions to offer.