I have the same unbelievable issue and it started happening immediately after I finished registering on SmartThings. (First usage.)
The remote control doesn't work, except the 'turn off' button, which it works partially since the TV automatically restart. It doesn't last more than a few seconds.
Ultra useless TV. A lot of time waited.
I have a Q7 F, same problem! only 1 year and half old, started doing same problem as many others here.
asked Best Buy and geek squad for warranty.
they deside to repair, 2 month with out TV!! still wating!
They said Motherboard and pannel, Im affraid to have the same problem when warranty expire!! this will be my last SAMSUNG TV.
I took a Video to show the tech. watch here
Got a Q7FN yesterday. Set it up and was working great last night.
Totday I have the error screen on the TV showing a red exclamation mark in between the OCB and the TV. Also the TV keeps turning on by iteself. None of the buttons on the remote work except the power button.
Called samsung support, they are sending me a new one connect cable. They say it will take 15 business days to get the cable.
Interestingly enough after registering the TV online, it shows I only have warranty till May 2019. Uploaded a picture of the receipt and now shows warranty under review. Hopefully they will update the warranty start date so I am not out of warranty if the new cable does not work.
This TV replaced a B8500 TV from 2009 which had not given me any problems. Sad to see the quality of flagship Samsung TVs dropped so much.
Samsung support team detected that it is the remote problem.
Since it is close to one and half year and the warranty is over.
The head of department Victor told me I need to buy a new remote myself. I spent top dollar over $3,000 for the the quality product, i believe. And the manufactuer is not standing behin their quality.
I do not believe it.
I hope their top managment can do something. He said he is the higest up, and sorry.
Beware, the product will only last for one year and you are on your own.
I will ask my family and friend to think twice if they would like to purchase a new TV.
I was facing this issue since couple of months. Yesterday i have pressed power button hardly it turned off and its not powering on like earlier.
Please re-do the same . Hope it Helps!