My Z3’s screen was “glitching,” as in the phone’s screen showed static noise from time to time. It was hard for me to do anything on the device, and the problem would be fixed for a really short amount of time by knocking on the phone (I know, that’s a very bad solution). Do you suppose that the cause of this weird “glitch” is an inconsistency of the LCD’s connector? Or can it be some other internal issue? How should I properly handle this problem?