I got a Samsung Smart 4K QLED HDR TV, QN75Q60T. I tried to connect with my Acer intel i3 PC desktop with a 4400 intel graphics card. The desktop PC I have been connecting to my Samsung LCD tv for over 6 years. Now I tried to sync to the computer to the 4K tv with HDMI, it worked for the first time, and then it no longer syncing. I tried getting a 4K HDMI cable, and it also worked for the first time, and it's not syncing anymore. I reboot the computer, pulling the cable, and plug back then. Turning the TV off, switching ports, and reset the Tv, and nothing works. If you know what the issue might be and how to resolve it, please kindly let me know.