# Power off your ***Vizio TV*** and ***unplug all cables*** that are linked to it
# ***Unplug the TV*** from the power outlet as well
# Search for the ***power button*** at the back of your TV
# ***Press and hold*** the power button for ***3-5 seconds***
# Now, leave your TV in that state for ***30 minutes***
# After 30 minutes, ***replug your Vizio TV*** and ***reattach all the cables***
# Finally, ***turn on*** your Vizio TV
Try this, hope it will work