Here's a similar case with the same model: https://forums.androidcentral.com/ask-question/804943-how-fix-flickering-screen-after-drop.html
From a moderator:
"Try a hard reset. Hold the power button and volume down button until you see the Samsung logo and then let go. Hopefully that will help. If it doesn't I would think then that you have done internal damage."
May the odds be ever in your display's favor.