High-contrast modes can sometimes force a black background; ensure they are disabled in Settings > Accessibility > Contrast themes .
Black screens can sometimes be caused by outdated graphics drivers; a clean reinstallation via the manufacturer's site (NVIDIA, AMD, or Intel) is often recommended. Black Wallpaper 1920x1200 - Pinterest 1920x1200 79 Black Screen Wallpapers on Wallpa...
Subtle outlines of continents or celestial bodies against a dark background. Practical Benefits High-contrast modes can sometimes force a black background;