I bet that your One Connect Box is the culprit...
Bottom Line: Buy a new/used One Connect Box that matches the model number of your current One Connect Box.
I own a 9000 series that went on the fritz one month ago. The picture would show up, then blue/green/red lines would fade along the screen, and finally the the whole screen would go black (with the blinking red light on the corner of the TV monitor going non-stop). This issue cycled about five more times until I never got the picture to come back on. I also experienced the same issues with remote control connectivity. I called and did the online text support -- none of the steps worked (plug into wall, default reset, firmware update, etc...). The Samsung rep pointed me to a certified repair shop, but after reading other troubleshooting posts, I saw that was not going to work.
In the process of trying to figure out what was happening, I noticed that my One Connect Box was really hot to the touch. I cracked open the case to my One Connect Box to see how it was functioning with power supplied to it. I noticed that the internal fan was no longer operational. The motherboard for the One Connect Box looked fine, but I figured that something must have burned.
A replacement One Connect Box from the Samsung site will run from $200-$475. You can probably find one on eBay for a more affordable price -- just make sure it is a match for your model number TV (just look on the bottom of your current One Connect Box; most begin with the letters "BN"). I was able to snag one for $150. Using my old One Connect Box cable, I hooked the replacement up to my TV and it worked! Picture has been solid for one month now. I'm convinced that the One Connect Box is the source of failure for most of us on this forum. It's not appealing to drop some $200 bucks for a replacement One Connect Box, but it beats buying a whole new TV system.
I hope this helps you save time and money.
I just tried everything and read everything call support and didn't get support just a repeat of what is online.
I blocked the power light and it has been working for an hour without any issues.
Hope this will help Samsung to solve the issue.
I've got a Faulty Q60T too. 3 months after owning it and I didn't even use it that much. The customer service is absolutely horrible. I haven't heard from anyone in a month and they decided to cancel my refund request without even telling me delaying the process even further beyond nothing getting done from calls, no email or call nothing.
For folks having this issue, here's how I was able to resolve mine. (My day old Q90 was shutting down by itself within a minute after being powered on).
After doing some research which mentioned that Samsung was replacing remotes inb order to resolve the issue, I've determined that the remote is the one that was triggering the shutdown of my Tv. (I first thought it was an issue with my OneConnnect cable getting crimped). I also noticed one time that the TV turned on by itself.
What I did was that after turning the TV on using the remote, I immediately removed the bateries from it. And wah-lah! The TV stayed on. Now, I don't use that remote anymore and instead bought an old school Samsung AA59-00637A remote. Problem solved.
Hope this helps.
I have been having a problem with my QLED tv similar to these. I use a Logitech Harmony One remote. I have created an activity called "Watch Smart TV". The problem is that it will sometimes turn the tv back on after I have turned everything off. I did some research and found that the problem is in the HDMI-CEC settings. I turned this off and it seems to have fixed the problem. Time will tell. I will repost if the problem re-occurs.
Re: Samsung QLED TV turning off and on by itself
I have read all 37 pages of comments about this issue on this site. I have the 2019 Q80R model and am having this same issue. I have unplugged the tv, the cable box, and my Sonos beam soundbar. Waited 15 minutes and replugged everything. It worked for an hour and I checked to make sure the software was the latest and that the automatic update feature was on. It was all good. Then it started turning on and off again. After reading all the comments, I started trying every solution offered. The Q80R does not have the one connect box so that isn't the source of my problem. I have taken the batteries out of my remote and it did not solve my issue. I replaced the batteries with new ones and reset the remote. That did not work. I turned off the Anynet+ HDMI-CEC setting but then my Sonos sound system doesn't work. So I turned it back on. Then I decided to just use the tv speakers and see if it worked. It still did the same thing. I just turned it back on since it did not solve my issue. This tv is not a year old yet. I registered the tv using the code on the box and set up a Samsung account, but they want the reciept for proof of warranty. Unfortunately I can not find the receipt. Therefore I can't prove it is under warranty. This is the most frustrating experience! 37 pages of the same issue from so many and still no solution from Samsung. I will never have anything from Samsung again.
I read your post. I too am extremely frustrated with Samsung. Wish I had read this thread before purchasing my 75" QLED TV 2 1/2 years ago. It worked fine till one week ago and then started having the issue everyone has posted about . I've tried everything pretty much and have had no success. I spoke to Samsung and they are not willing to do anything . I have emailed the VP of customer servie and next week will try to track him down by phone . His name is Chris Kim , email email@example.com . Maybe if we all pound on him we will get a response.
I have 5 other Samsung appliances in my home and if they do not address this I will never purchase another Samsung product
I too am having an issue with On/Off... My TV, unplugged from everything would turn on (you would see the back light), hear audio from HDMI 1, and then would turn off before the TV would display the input.
My TV: QN75Q60RAFXZA, Version CA03
The TV was purchased from Best Buy in December 2019. The first failure occurred last March (2020). Technican came to the house (under warantee) and determined that it needed a new Panel.
TV had been working great until today.. when it went out again. Called Samsung and they wanted to charge for the repair, as the TV was now 15 days out of warantee. I balked hard, telling them that the Panel they replaced only lasted 9 months. They initially offered the parts for free, and then decided to cover the cost of labor too. I have a service call setup for this Thursday, so we'll see what happens.
Clearly there is some manufacturing issue with this series of TV as there are too many cases similar to mine. I do like the TV, but am contemplating selling it after the repair, and using those proceeds to purchase a newer TV (with a better warantee from Costco).