Nexus 7 red screen

Hi! My Nexus 7 (2012), all of a sudden, starten show red pixels where there should be dark ones. At first i could put presure on the screen and make them go away for a while, but now it’s permanent. See attached picture. What could be wrong, and how can I fix it?
PS. It’s also reaaaaally slow now, but I don’t think that’s related. Got that Android 5.1.1.

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