TVs will have settings for 'HDMI Mode', or something similar, where you can choose between '1.4', '2.0', or '2.1', or have other settings called 'Full Color' on Vizio and 'HDMI Ultra Deep Color' on LG. Enable the highest bandwidth setting on the TV.Verify that the input is put in properly.
Once you fix it, there's no need to do anything else. If that doesn't fix anything, find your related issue below. Check your HDMI connections, and if possible, unplug and plug them in again. Of course, the first step to any technology-related problem is to check if all components are properly plugged in.
