I Think you Should Replace your iPhone’s screen. This happened to my iPhone 5s. The Repair will Be easy just Remember to NOT BEND THE SCREEN MORE THAN 90 DEGREES. If you need help with your repair use iFixit’s Guide they are your best friend.
Ok, The same thing happened to me On my iPhone 5s 16GB so I watched a Youtube video that helped but if it dosnt’t helps you then you have shorted the screen or have bent the screen more than 90 degrees. Youtube Video:https://www.youtube.com/watch?v=kbP2BTUK...
You don’t need to be scared of the repair,just remember to unplug the battery.I will post the link below for the screen. Samsung Galaxy S6 Digitizer:https://www.google.com/url?sa=t&rct=j&q=...-Screen-Digitizer-Assembly-Samsung%2Fdp%2FB08FM8TL95&usg=AOvVaw3VLX...
Have you tried backing up your Mac and then reset it? Update (03/25/2021): First Backup your Laptop then Disconnect the Battery and disconnect the Display connectors. Then Flip the Macbook and Hold the Power button for 10 Secs. Plug everything back and see if that helps.but don’t plug in the charger right after your done plug it in after 1H
I will recommend you buy a new screen then something happened to me when I replaced my iPhone Screen because if you bend the flex cables more than 90 degrees. But before you buy a new screen, reset the Phone and see if that helps.