Surface Pro7 Typer Cover don't work

Hello everyone, I need your help.

I have a Surface Pro 7, and a few days ago the keyboard cover stopped working. I have a Surface Pro 5 at home, and I tested the keyboard on the Pro 7, and it works fine. The controllers are up to date, and I don't have any drivers to install. Right now, the Surface doesn't recognize the keyboard. Now, an odd question: is there a key that turns the keyboard's Bluetooth on and off? I don't want to factory reset the Surface.