How do you fix black screen on doom 3?

To fix the black screen issue in Doom 3, first ensure your graphics drivers are up to date. You can also try adjusting the game's video settings by launching it in Safe Mode, which can be done by adding the “-safe” parameter in the game’s launch options. Additionally, check the game's configuration files for any incorrect settings and consider disabling any overlays from software like Steam or Discord that might interfere with the game. If the problem persists, reinstalling the game might help resolve any corrupted files.