I have a Sony Xperia Z2 phone. In the last 2 months, the backlight has been rising and falling uncontrollably. Light flickers and vertical lines appear in the middle of the screen and disappear. This is starting to happen. I've erased a lot of applications, the situation hasn't changed. Decreased in safe mode but not over. I returned the device to the factory standards. Nothing has changed. The device can be the battery for 3 years is the reason?
