what you have explained may be the start of the problem as the display pixels are vanishing the display itself needs to be changed. if you are not too concerned of the kms showing or not i suggest wait for some more time till more of the pixels vanish as changing the entire console may be expensive and may take some time for the guy to get it. but i would sill suggest to show this issue to a good workshop and they can guide you to solving the matter. all the best