Chosen Solution
Even after turning off the hardwear overlays my screen still flickers when turning off/on and when brightness is all the way down PLEASE HELP I live with my epileptic grandma and it’s NOT good
By flickering, do you mean when you press the power button it goes a green type color?
settings>display>brightness. If brightness is at zero or near zero, slide finger to right over current level or set brightness on automatic.