still after reset.. it always happened with always on display only.. if I off always on display nothing will happen otherwise it'll

does your problem is now resolved?

do I need to change the display? or it will be resolved?

I also checked my device from nearby Samsung service centre and there are no hardware issues in my device. they also update my software again (nougat) bt the same problem occurred again nd again.. is it need to replace the screen or it is software is...

yes.. after updating nougat from Samsung care centre also I faced the display blinking in my c9 pro  does we need to replace the screen or it is software issue only.. please provide some solution to us...