MacBook screen goes purple tinted and freezes

Hi! new here

i’m using my macbook with another monitor, so rarely use the macbook built in display. So usually remains at 0% brightness.

since a week my macbook screen showed the upper and lower part completely in black and with a glitchy aspect, and since 3 days is tinted purple and completely freezes. sometimes it kinda turns back to show moving footage but usually i still see what was showing when it froze.