As our electronic devices become “smarter”, the less control we have over them and there performance becomes increasingly stupid.

We have a Samsung and Xfinity and we find that like clockwork the TV shuts off once per night. It turns back on with no issue, but we’re back to the basic initial screen.

Check the AC plug in the wall outlet and the back of tv. Some Samsungs will turn on with a power surge or plug that keeps causing simulated power off/on to outlets. In other words a loose plug.

TV auto on
 

I have seen this happen on Sony, LG, and Samsung TV's. The fix for this on all the TV's was to disable the wake function on the HDMI inputs under settings power management. The HDMI-CEC will allow your devices connected be controlled by your TV remote, but this also allows connected devices to turn on your TV, I had a external speaker that would randomly wake up my Sony TV, a firestick that would wake up my LG, and the cable box for the Samsung. I turned off all the CEC related power management, which is problematic on all TV's, and have not had any issues after doing so. I was beginning to think I had some ghosts that liked watching TV. Lol

Welcome to our new world. It is not stress that kills people it is stress that you can do nothing about. Computers, includes most electronic devices you will do it my way.
You curse at the computer and it says thank you. You try to find a HUMAN sand it goes through the meaningless text again. Eventually it resorts to hanging up on you.

As always, it’s all about money. If we have control over electronic devices, we could prevent them from gathering data that can subsequently be sold to third parties.

Maybe deceased uncle Earl doesn't like that show!

I can't help it. I doubt your TV warranty covers bullet wounds.

Had similar on/off problem with different manufacturer. I resolved the issue by removing the batteries from the OEM remote and used only my Firestick remote, we cut the cord. Somehow I think they were in conflict with each other. No more issue. Good Luck.

Totally agree!

Your input is set on TV ( that assumes you have an antenna ). Press input button ( or from input menu for smarter TV ) to change your input to correct HDMI or correct Wireless port whichever you are using for cable TV. This is from Samsung remote NOT Xfinity remote.

Cheers!

1. Press the Home button on remote
2. Go to Settings-General-External Device Manager
3. Set 'AnyNet' to OFF. (This allows other devices to control your TV)

if that doesn't solve the problem, try this:

1. Press the Home button on remote
2. Go to Settings-General-Network-Expert Settings
3. Set 'Turn Power on with Mobile' to OFF

Hope either of these things helps!

Is the TV setup programmed for a timer on & off ?????

Have you tried the suggestions here:

how-to-troubleshoot-the-samsung-tv-that-keeps-turning-off-by-itself/

Very strange. I read your post, I left some replies-guesses. Was watching a recorded show, we have xfinity. We went out, shut off the TV. When we returned the remote would turn the TV on, it would not boot up, it would shut itself off. HUH?

I rebooted the modem, I disconnected the power strip connected to the TV and I either fixed it or truth it fixed itself.

Far from a technical expert. I have each related device plugged into a power strip with a spike protector. To reboot it is one switch for each section.