You need a pixel un-sticker, or a dead pixel fixer...What u will need to do is somehow connect your pc to your tv, or get to play this.
Those are dead pixels. It's common to happen on an lcd tv. To my knowledge the only way to fix it is to take it to a repair shop. It should take a week at the least, although I'm not sure how much it'll cost. Here are also a PPI Calculator that through which you can calculate pixels density instantly.