オリジナル投稿者： mnoivad ,
When an iPhone touchscreen fails to respond to touch events that means either the digitizer which is permanently fused to the display is bad or the cable from the digitizer to the board is either broken or incorrectly seated. (1) examine the connector for any sign of damage (especially where it connects to the logic board). if it looks okay (it might not be even with careful inspection): (2) try carefully reseating the display connector If that fails then replace the display assembly. It is exceedingly rare that the logic board is the culprit with light water damage since they usually short out completely when water gets into them. What usually happens in moisture gets somewhere in between the display and the digitizer and shorts out the digitizer. I’ve seen this happen on more than one capacitive touch screen when water doesn’t completely destroy the device.