I switched out all of the hdmi cables and disconnected my fire tv 4K. I was watching YouTube on the internal app and had another reboot. I guess I’m exchanging this tv also. Hopefully the third 85” will be problem free. Besides this one has a couple of dirty finger looking spots and DSE jail bars. Also couldn’t get usb 3.0 drives to work with the blue USB port. Great picture though besides the DSE.