Second hand Furby boom thinks she’s being shaken - help?

So i got my first furby today second hand, a polkadot furby boom. Problem is, when i turn her on she screams and says she's being shaken when she's just on the carpet? I tried screwing in the bottom plate and putting her on a different surface but it didn't help, and resetting just made it more frequent. What do i do? This is my first furby and im hoping to not have to take her apart.