Question help there is a dark blue spot and line on my screen

Jan 24, 2021
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I have an asus gaming laptop and all of a sudden today, a black spot and line leading from the top of my display appeared. is it dead pixels or did something get behind the screen? i think i left it open for ten minutes and came back and it was fine but then randomly it just appeared. i (very stupidly) pressed on it and it got thicker. but anyway i am very confused so somebody help me and let me know what it is and whether or not it’s fixable.
 
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