Family member gave us this Dyson V11 Animal.
The battery charging level is stuck on 75%.
The blue lights on the battery are blinking.
The hoover does not operate when the button is pressed.
Depends on how much you are prepared to spend on it. Batteries approx. £90, new body with switch and controls approx. £140. Try here https://www.dyson.co.uk/support or a google search first though before you start throwing parts at it. My guess and it is only a guess is that it needs a new battery.