Hello
Check all the signal cables at the backside of your Vizio for firmness. If there is any loose or bad cable connection, especialy with HDMI; will poise this problem. Check the input selection also. If improper input selection is done, there will be no signal logo will fly around.If you have selected TV instead of HDMI, when HDMI is connected and you want to see the programme, is an example of improper signal selection. Check these. OK.
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