Cracked glass, a touch dead zone, or lines on the picture.
A drop. On older iPads only the glass is replaced; on newer ones, the whole display.
We replace the touch glass or the full display, depending on the model.
It depends on the model and on what we find inside, so we quote each repair individually. The diagnosis fee depends on the device, and you approve the exact repair price before any repair starts. If it can't be fixed, you only pay the diagnosis.