So, I have a digital piano, a Casio CDP 130 that I bought at the start of the year. It has been working perfectly until yesterday a friend of mine was playing it and noticed that when the seventh B of the piano is pressed, all the keys near it lose all sensitivity. They sound louder even with the softest touch.
I don't use that part of the piano that often but it really bothers me because if I press that note and then another one near that one it sound really loud and breaks the harmony.
As I have said, it started happening recently. For details, I have a cat and she oftenly sits on top of the piano, but only when the piano is in its cover. I also clear it with napkins before and after playing. But even though I pressume that some of my cat's hair has gone into the piano and is causing this problem. I don't have a lot of knowledge on digital piano so I don't want to open it and break it completely, so if anyone knows how to resolve this problem it would very much appreciated.
Edit: As someone has asked in the comments, yes, the problems goes away as soon as I stop pressing the 7B key.
Edit2: So, I was about to open the piano in order to see if there was dust or something else in the key, but before I opened it I played the key once again to be sure it was that one, and suddenly the problem isn't there anymore. No matter if the key is pressed or not, the keys retain their sensitivity. So no more problem. I will be having an eye on that key even though in case something happens. Thanks to everyone who answered me.
Thanks for reading.