Chosen Solution

Screen was completely destroyed nothing shows, nothing works, but it connected to itunes. i tried to recover, i deleted the iOS and everything and then it showed me iTunes errors 3194, 4005, 4014. What to do?

I tried an iPhone 6 without screen plugged into charger and it just loops with the charging sound meaning it crashes shortly after boot and keeps looping. So no you can’t boot the phone successfully without a screen on iPhone 6.

Error 4005 or 4014 is a hint that there is a problem with the NAND Flash memory. Maybe there is a cold solder from the hard drop event, so that you cannot restore it.