What could have caused this damage to TV?

I have had two TVs develop the same fault (as pictured) within a week when using to play PS4.

The screens look as if they have been knocked, but they haven't. Just happend mid game.

The TV is only conected to a PS4, could it somehow be the cause, or could it be a power surge? Don't want to replace with a 3rd screen without knowing what has caused damage?

Very grateful for any help. Thanks.

from AVForums https://ift.tt/2CJcIgY

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