This has happened with my new HP OMEN (2020 with ryzen)īefore writing here, I tried various potential solutions including turning off adjustable brightness (couldn't do it since such option simply did not exist on windows), tried disabling/enabling display and monitors drivers, using basic windows display driver, uninstalling and reinstalling them, updating all drivers, looked at some registry solution which should have allowed me to change brightness from 0 (screen off) to 100 (full brightness) according to guide, then some sort of CMD solution, troubleshooting power settings, which said that brightness has been optimized, but it didn't change at all and finally, fully clean reinstall of windows.