Just a small tip I wanted to share after setting up the new display for my mirror project. Those of us working on these projects definitely need to check the screen frequently to ensure there’s no backlight bleed or dead pixel ruining the mirror effect. Instead of having to install a specialized module just to get a black background, I switched to using a simple black screen tool
https://blackscreen.space that runs right in the browser. It’s incredibly convenient and light on my Pi—just open it up, and you instantly get a perfect solid black screen, ideal for quickly checking display quality or putting the mirror into a temporar no y “stealth mode” without deep diving into the module configuration. If anyone needs a quick debug or screen test, be sure to bookmark this!

Moderator: Edited to expose url