Seya
Super Moderator
Long screw damage is typically caused when the wrong screw is used during reassembly of an iphone screen replacement.
Long screw damage can be caused on many different devices such as the iPhone 5S, iPhone SE, iPhone 6/6S and 7 series. Each model has different locations for possible long screw damage. Depending on the model of the iPhone long screw damage can range in severity from "basic" problems such as no backlight, no service or much bigger problems such as no image, blue screen on boot, or even no boot caused by a 1v8 short.
iphone 5s Long scew damage schematic