Samsung tab s 8.4 system, screen fault

Hey! My Samsung tab s 8.4 has developed a really annoying fault.

It functions just like it should, no problemo then randomly the screen starts to go all fuzzy like lines glitchin on screen then the whole thing turns green and the screen doesn't work, can't see or select anything. I can hear the volume and power keys working but they don't do anything, can't restart etc.

It was like that for about 3 hours one night and then it randomly came back to like as it should do, I'm thinking happy days then it started with all the fuzzy boolax again. I don't think there's any hope - keeps doing it.