I have some misunderstanding for some seems like a stupid question, but it is possible to destroy the LCD display of an iPad mini 2 without destroying its touchscreen (digitizer)? I ask this because my son's tablet has many colored vertical lines on the screen and I went to service and the boys there told me I lost the warranty because the LCD display shows mechanical blows. I mention that the touchscreen is the same as the whole tablet, does not show any scratches or cracks or it was dropped or hit, basically looks like it was new.