i have had me xperia zl fo about 9 months, now i noticed that the screen would turn off while i was doing something on the phone. Then when I tried to turn the screen back on the screen would turn on but no picture just a black blank screen. I can tell the phone is still on because when I connect it to pc it connects and shows my files on the phone also there is sound coming from the phone and when i touch the screen i can tell the touchsceen works cause it gives feedback. Sometimes after trying on and off with the power button the screen shows a picture.
One weird thing I noticed is that if I put a little bit of pressure on the back of the phone, in the top right corner where the usb plug is, the screen goes all weird with lines, discolored and turns off.
I am wondering if anyone has this problem or input on how i can fix it it would be greatly appriciated.
i can make a video if anyone wants to see a visual.