Okay, that detail helps. You will be able to confirm this later- plug into external monitor with laptop monitor off- if no issue which I suspect will be the case- the problem is in the display panel. If you still notice it on external the it is tied too intel cpu. I think the eDP (embedded display port) on panel is failing tho. In any case I would backup the important stuff, there is a problem and I believe you will have to send it in for repairs. (not a simple user fix). Sorry I can not help more, just a user like yourself that just trys to help- background former electronic eng tech and programmer, not Acer employee. Point is, you got a real issue with that one which I have hardly ever seen.
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