Hello guys, I have bought Sony Xperia J two years ago but now a days I am having very serious problem when I press lock button it does not come back, the screen goes black and the sensor button on bottom keep alive and also notification light also blinks. When I remove the battery I and put again battery then it turns on.
I have reinstalled the OS of Xperia J many times by using Sony Update Service and PC companion but it always show this problem. I have used all method to solve it which have been defined in Sony's website but nothing works. Please tell me how to fix this problem