I have broken my screen from inside how to fix it?

@akrch since iFixit does not yet have a specific guide for this, start off with this guide Lenovo Tab 4 TB-8504F Battery Replacement and then use something like this video Replacement screens are available at many online stores.

While you work on your tablet, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!