One potential such problem is that the TV will seemingly be on ... the problem is to press the Menu button on your Vizio remote. If the menu pops up, then there's nothing wrong with the display ...

The new 4K TV also comes with a Vizio Voice remote control with a built-in mic, works with Alexa and Google voice assistants, and supports AirPlay2 and Chromecast for streaming from a phone or tablet.