So I went about 5 hours last night trying to figure out what it was. Safe mode 20 times tried every option except the factory reset. Caught a couple of times lost the signal right afterwards. Switched to the TV in my bedroom ( living room sony Bravia bedroom Samsung whatever model it is) same thing no signal unless boot to safe mode. I got fed up and was ready to people's elbow the %#*@ thing when I unplugged everything - and I mean everything- , from the hdmi on both the TV and the system to the power cords on the systems and the walls. Left it like that for about 20 minutes. Plugged everything back up and works like it never broke. Give it a shot might help. Unplug everything off the wall and systems, go listen to Britney spears for half an hour, walk your dog, go down the pornhub rabbit hole, whatever keeps your head the !&&* away from that stupid system and then plug everything back in and start it. Hopefully this works for you because it did for me. Now I'm downloading a software for the last 2 hours.