There is an option in "Developer options" when enabled keeps the screen awake and doesn't let it go off until it's turned off. I have this enabled and never see a screen saver, it also helps with the "black screen" bug.I am sure TVs were off. The first couple of days after the install I never saw the screen savers. Just started all of a sudden when I turn off the TVs. Unplugged one of my TVs that has a WJ4 attached and the screen saver went off. I have now turned off both my WJ4s and both of my J4s screen savers settings and pulled the cord re-boot for all of them. I don't need any screen savers to be functional. Will see how goes it.