The Vizio e480i television is a 48-inch television produced by Vizio, Inc., which was founded in 2002 in California. The Vizio e480i is classified as a smart TV and can be identified by model number E480i-B2.
Does the problem persist regardless of the image on the tv?
If so it sounds like you are experiencing some dead pixels which are unfortunately not repairable. I would recommend contacting the manufacturer about a warranty as this does sound like a defect.