mine is just vertical lines in the half of the screen if some of you has this issue i tried a few thing temporaril
y and right now im still trying to find solutions , this happened when my Ipad Mini was 7% batt. left and i forgot that it wasnt auto locked so it was still open and when i came back from finding my charger it was 2% and started to do the vertical lines but it was gone after the battery drained at 0% and it came back when i was using it for a lot of hours while charging,if anyone of you has this problem then ill try my best to update you all if i found a fix for it