When i press my lock button the screen should go black and just clock should appear( because I enabled always on display)but there is something wrong with my device after pressing lock button my screen goes green for while and colours are vibrating (looks like shortage of power supply) and after sometime it goes black and works perfectly but every time I press lock button it happen again.i provided a screen shot and a video which will clear u perfectly so watch it and if u know any solution then plz help me
