Add me to your growing list of QLED TVs that are failing. Mine is doing the same thing. It's just over 2 years old, model QN75Q7FAMFXZA. See my post here: https://us.community.samsung.com/t5/Qled-and-Frame/Dead-Panel-75-quot-QLED-2-565-00-Repair/m-p/82173...
I paid $100 for a service call for them to tell me it will cost $2,565 to replace the panel. IT'S ONLY 2 YEARS OLD!! And I originally paid over $4,000.
This is beyond unreasonable for a top of the line QLED TV. You clearly have a manufacturing defect and if you can't stand behind your customers, then you'll lose customers. That LG OLED is looking like a really nice product right about now...
So can you help us?
***Found a fix*** so I finally found something that seems to fix the issue. I saw it on another forum. Turning off FreeSync in the TV settings has stopped my TV from rebooting for the last three weeks. The setting is found under game mode settings. I have the Q6 series with an Xbox one attached. Seems like most of these post people either have an Xbox one or they are using the optical cable. I don’t have an optical cable so I know that’s not the issue on mine.
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.
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.