Screen tweaking out!

[mrslv]

My screen strarted tweaking out and sometimes when i try to unlock my phone the screen goes black.

[Uliwooly]

@mrslv

That seems to be a hardware issue, you might want to back up everything and repair it with XC, just to narrow down the problem and to have a backup of your data. 

Xperia Companion (XC)

Software Repair Guide

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355