Hello Julia Greco and welcome to the Microsoft Community!
According to your feedback, you are experiencing a black screen after reinstalling the Bluetooth driver, removing the driver
and the laptop does not display the Windows or Lenovo logo.
Generally, this is considered a hardware problem
Because, the computer can't display the Lenovo and Windows logos.
In this case, it is not possible to enter the bios, and the motherboard does not recognize the system on the hard disk.
Do you see a lot of dust on your laptop? You can clean it up.
If not, you can only send this problem to Lenovo's official support.
Because, this is not a windows system level problem anymore.
You can let the Lenovo support staff to test your computer
to help you solve the problem.
We hope you find the above information helpful.
Kirito|Microsoft Community Support Specialist