If you have stuck pixels, dead pixels, or just general burn-in worries, download this little HD (1920x1080) animated GIF to push each pixel individually through red, green, blue, black, white and every frame refresh changes every pixel. This can un-stick stubborn pixels and can potentially mitigate burn-in.
Just play the GIF in your favorite video player full-screen and let it loop overnight. See if it doesn't make a difference.
Download this image:https://uimgs.com/1920x1080.gif