U2913WM, pink tint surrounded with red dots.

the pink tint is surrounded with red dots and only visible in dark/black background , there are 2 of them about the size of a fingerprint. I've tried every software that fixes defective pixels but none worked, I guess these pink patches aren't really stuck pixels but something else, I'm sure it isn't a faulty cable or graphics card cause I removed those and  the pink patches are still there. 

thanks in advance.