Z Pro display left side flickering

vinvinno

Hello,
the display of my phone is sometimes flickering. But only the left side (mostly the corners) is impacted.
Directly after starting the phone it was quite strong. Then after two days suddenly it stopped (i changed nothing). Now after about half a day its back again.
I did a firmware reset, downloaded all updates, turned off the automatic brightness adjuster but wasn't able to calibrate the proximity sensor. At step two it always says I should "obtain a valid value". Does someone know where exactly this sensor is located on the phone and what I could try to calibrate this sensor?
Maybe someone has some tips, what else I could try to get my display working.

(I'm no native English speaker so I apologise for possible mistakes)

MarcinP

Proximity sensor have nothing to do with the auto brightness of screen. Only light sensor but this sensor can't be calibrated. Please switch off auto brightness and test for few days.