If your Vizio TV’s HDMI port is not working, the most successful fix is to perform a hard restart by unplugging it from the power. Alternatively, you may need to replace the HDMI cable or port, change the device display settings, update your firmware or perform a factory reset. vizio tv keeps changing resolution? vizio super resolution on or off.

How do I get my Vizio TV to recognize HDMI?

If you are connected to HDMI 1, press the Input key on your VIZIO remote, and use the arrow keys to select HDMI 1. If you are connected to HDMI 3, press the Input key on your VIZIO remote and use the arrow keys to select HDMI 3.

Why is my HDMI port not working on my TV?

Reconnect the HDMI cable firmly to the same terminals as before on the TV and the connected device. Turn on the TV and connected device again to let them recognise each other. If the issue continues, repeat the process but try a different HDMI input on your TV to see if this improves the situation.