Why does my smart tv turn on and off overs and overs.

"Go into Settings / System / AnyNet+

Turn OFF this setting fixed the problem for me."

"The problem is caused by the TV auto downloading software updates and you allowing an upgrade while on a Wi Fi connection.

It must be on wired CAT 5 or better LAN CABLE back to your modem.

After it switches off and back on, it has now lost the Wi Fi password, so it keeps cycling off and on, as it cannot complete the set up with no Wi Fi.

I found that I had to go and deselect in the TV menu, to the get the IP details from 'automatically' to 'manual' to get out of the never ending loop of switch on and off.

My set was getting worse from once every 30 min to every minute, and it was not a soft turn off, but the audio was violently loud.

I have this happen several times over the years since 2012, and had banned at the modem from connecting to Samsung TV Software update. I had to factory reset the modem from another issue, but unfortunately an update slipped past me and onto the TV.

Nothing ever gets better from their updates, but causes trouble every time with simple things like HDMI no longer working.

What you need to enter into your modem 's 'blocked sites' as www.samsungotn.net

Then it cannot update the software, but the apps on the Smart Hub will update.

Some apps crash on update and cause similar issues, and if you have no internet connection, they will not cause so much a problem."

I have been having the same problem, I tried the above solution with memory card but wasn't able to get that to work, upon more research I found a post that said to remove the back cover, and unplug and replug the circuit boards, and anything that has a plug, and blow the dust out of the connections. Very easy as the post said, nothing that can really go wrong, the tV was useless. Low and behold, upon re installing the back and plugging in the set, for the first time in a month the set is working. Low tech, solution even I could do. Sorry for the neighborhood fix-it guy, he would have charged me 50 bucks just to diagnose it and Whatever part he thought I needed. I love the internet. Thanks to those that forged the road before us.

Check the remote https://youtu.be/2Jg7cMw2d18

"So... I have been having the same problem for about 2 months and it just got worse. I opened the back like you said and cleaned all the connections 2 days ago. So far so good.

If this works.... I will give you all a million dollars.... When I win the lottery :)

Thanks guys....

Going to watch the Washington vs LasVegas game!"

The problem is not in the Wi-Fi module, Just in power consumption. In my opinion you can freely put Wi-Fi back in, remove the cord between mainboard and power supply board, turn it around, then plug again. You will see that one vein will be a little bit darker in plug. That because Samsung picks too thin to deliver so much energy to mainboard.