Hi I'm sorry to hear that. How old is your Digital Piano?
Also were there any power outages or storms in the area just prior to this event?
And did the non working keys fail all at the same time or separately over time?
Hi, here is a site that may help. Let me also know if its a bank of keys that arent working or scattered?
But also check this site out;-)
Please rate kindly before you go, theres no cost to rate. And you can reach me then anytime you have further questions.
Thank you and have a wonderful Sunday!