White blotches arranged linearly on the laptop screen

archz2

I am having weird white spots on my Acer Nitro AN515-52 laptop in the last few days. These white blotches are arranged linearly at along the lower one-third of the screen.They don't appear if I connect my laptop via HDMI to another screen. They are clearly visible on a white background and extremely difficult to notice on any other dark background or even grey background. 

My laptop never fell and no-one hard pressed the screen. It has always remained at my table in the past one week before which there were no such blotches. What has gone wrong? I bough it in March 2019.

andylb

Sorry to say that in my opinion based on the fact that it doesn't appear on the second HDMI connected screen, that it is a screen hardware problem. the blotches are too big for dead pixels. If you are under warranty I'd talk to Acer about returning it