Black screen but sound in the background (Valheim)

A friend had a problem with a black screen, there is a download at startup, but when it comes to appearing in the menu, a black screen appears and everything freezes, but there is sound, nothing works, you have to restart the PC. And what's the catch, before that everything was normal, we played for 20 hours and everything was in order. Maybe, of course, it was influenced by the fact that I took another character and took resources from my world and went to him. Updated the drivers, launched in a window, on behalf of the administrator. Nothing works and also a black screen.