screen problem help

Hello i have screen problem with my note3. Problem first and i dont have explain why do that.... so.. i want unlock phone and i see the screen color was chamged to little green. I locked phone and unlocked the phone color was ok. Now in the morning problem replayed. Now im unlocked with the color green and i see my screen goes green but not white. I locked and turn on again phone was ok. So what is this? Software? Android? I dont wanna FR. Becaz files loose. Before 2months ago the phone was dropped on screen with s wiev. And one time pulled on the floor. With s wiev. Any sympthoms of dropped phone? Plz help

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