I recently purchased a Vizio E43-E2 4k TV. I first purchased the TV with a 30 foot HDMI cable and connected it to one of my computer's graphics card's ports. My card is an ASUS GeForce GTX 1060 6GB. My other computer components are all quite modern, as I built this PC about 1 year ago. With this 30 foot HDMI cable, the signal was displayed from my computer to the TV; everything worked just fine. However, the HDMI cable wasn't quite long enough, as it ran through the middle of my living room.
I eventually went back to the place where I purchased the TV (Microcenter), and returned the 30 foot HDMI cable for a 12 m (about 39 feet) HDMI cable, which is long enough. The manufacturer of the new HDMI is not the same as that of the cable that I returned, but they both are 4k ready HDMI cables. When I arrived home and connected my TV to my computer, no signal could be displayed on my TV from the computer. No matter how many display options I tried on Nvidia's control panel, no matter what order I powered my devices on and off, no matter which ports I connected my cables, nothing has been able to get a 4k signal to my TV. I was able to get a 1080p signal to display on my TV, however.
Sounds like the HDMI cable that I purchased was advertised falsely, right? Well, I also connected the HDMI cable to my 4-year-old laptop, which has integrated Intel graphics processing. My laptop displayed a 4k signal (3840 x 2160) at 30Hz to my TV on the first try. My conclusion was that the HDMI cable is fine, and the TV is fine... something must be wrong on my desktop computer.
I called Nvidia for support. The tech support representative had me try several different things, many of which I had already tried. Nothing that he recommended could get a 4k signal to display from my computer. I have since been receiving suggestions from Nvidia via email, every day, with troubleshooting suggestions. This support has not been helpful. Their most recent suggestion was to take a Screen Capture on my PC and send it to them (the screen capture shows my desktop on my computer monitor adjacent to my desktop on my 4k TV, but of course, no desktop actually displayed on my 4k TV). They also suggested I try changing the aspect ratio on my TV's menu (which did nothing to get a signal accross, obviously), and also suggested I check that the firmware on my TV is up-to-date. The firmware is, and has been, up-to-date.
So, it's been a week now that my computer has been connected to my TV, but I can't actually enjoy it. Yes, the TV's built in SmartCast feature works fine, so I can still cast YouTube from my iPhone, and I can still go on Amazon or Netflix and watch movies with those apps. But, of course, I should be able display a 4k signal from my computer. Worked just fine before I exchanged the HDMI cable, so it should work now.
Thank you for taking the time to read this. Do you have any ideas, or suggestions?