I am using this TV with my PC mainly for gaming. It is connected to an EVGA NVIDIA GTX 1080ftw edition card via HDMI. My computer is running the latest version of Windows 10 Pro and the latest 445.xx version of the nvidia drivers. So here's my issue.
I was playing games on it without problems a few days ago, and after that I put my computer to sleep. And today when I went to wake up my computer and turn on my TV, all I get is a black screen with nothing on there. I Know windows is still working in the background. Without being able to see anything on my screen, I had to force shut down the computer. So upon restarting my machine up numerous times to see if the TV would go back to normal, it's still not showing anything. I have tried several things from restarting my tv, resetting it back to factory defaults. Changing to different HDMI cables, switching inputs, connecting other HDMI devices such as my Apple TV 4th Gen to see if I would get anything to show up and still a black screen. So then I had a 2nd 23" 1080p monitor and I connected that to my PC via DVI cable and voila, upon booting up Windows, my desktop displays normally. I then tried to open display preferences and nvidia preferences to detect and setup my TV as a 2nd display, it would detect it but the TV still is black and no image at all. I tried several times to remove the HDMI cables and replugging it back in to see if it would show a picture and still nothing. I also tried reinstalling (clean install) of my nvidia drivers as well.
But there is this weird thing that I noticed when my TV was working properly. That there would be times where the screen would switch to black quickly and then back to normal. It did this randomly at times and I'm not sure why. But it didn't bother me much because it would happen occasionally.
I'm starting to think this could be a problem with my computer, driver or GPU not sending the right signals to my TV and perhaps it's somehow out of sync? I tried looking online to see if I could find a solution and I tried what people have mentioned above and still couldn't get it to work. The TV is only about 2 yrs old and I don't use it much, I really hope that there's nothing wrong with the TV.
For the time being I have my PC connected to my ASUS 23" 1080p Display via DVI just so I can at least get to and access my desktop. But still a no go for getting anything to display on my Sony TV.
I've been using a multidisplay setup for awhile, my 23" 1080p monitor with my 55" 4K Sony TV. The Sony TV would be my primary desktop while my 23" display would be my secondary. It sits to the left of my TV. Recently I decided just to use the Sony TV as my main display and have removed the 23" display from my setup without any problems.
I heard some people use an app called HRC Hotkey Resolution Changer from https://funk.eu/hrc/
that will automatically startup with Windows and assign different resolution settings to hotkeys, and then when they pressed that hotkey it would change the screen settings and that somehow fixed things. I have yet to try that yet. I would appreciate any help that you guys can give me. Thanks in advance.