weird static noise on Sony xperia z3 screen

[Nick]

Hello guys, i got this Sony phone that randomly and frequently shows these things. usualy even moving up pictures on the screen and pixelating the start screen. Customer asked me to replace the LCD but i am very doubtful that this is the case. This looks like a fucked GPU (do android phones have dedicated chips?)

 

[dukefawks]

Bad screen would be my first suspect. Only one way to find out.

 

[Nick]

Yeah too bad It's expensive as fuck and I would be pissed if I had to replace it for nothing...

 

[Nick]

Here is a video on the behaviour https://youtu.be/cvkRb8PWwOg

 

[dukefawks]

Reseat the connectors, if that does not help the LCD is fucked.