The screen was cracked a while ago. Now its flickering yellow. HELP

Hey there! My phone (S7 Edge) was cracked from the middle of the screen and spidered out from there but this was over 4 months ago!! And now the screen is flickering yellow, you can see the always on display but when you go to the lock screen the entire screen is flickering yellow. The touch display is still usable and makes noises when unlocked and can click stuff but cannot see ANYTHING because its covered by this yellow lines. Similar to this phone (Video: https://www.youtube.com/watch?v=92lXA7PM...) but the entire screen is yellow flickering and the lock screen and home screen are not able to be seen. PLEASE HELP!!! I just need to know what needs to be replaced!!