iPhone 6s plus black and didnt have visual after screen replacement
Here is our overall answer how to revive a phone that is frozen and you can’t operate the screen, can’t turn it off or can’t turn it on. 


iPhone 7 is frozen and I can&#39;t turn it off


Once you’ve exhausted these steps, you will need to repair the part that’s not working and if you’ve repaired the screen already, it might be a more costly piece or a cable that’s failed.