lock screen problem

[dghtran]

I clicked the power button, tried to turn on the screen when it was locked, but it wasn't turn on, i saw the light of the screen, but the screen is still black, the screen just come back when I turn it on and off a few times, anyone knows why?. sorry for my english

[xaviercned]

I've also bought this smartphone recently and the same thing happens to me when I call or when I receive a call. But this doesn't happen all the time.

[dghtran]

i think your problem is because the screen protector, it hides the proximity sensors

[No23]

Are you sure it's the screen protector ? OK I will try cos having this same problem. Thanks

[Uliwooly]

@dgh_tran

test it with and without the film

settings > about phone > diagnostics > test > test proximity sensor

[amit_rocking87]

there are 2 types of screen protector available in marker . one do hide sensor and one does not .. select the second one.

when you find even after pressing power screen is not getting on but there is some light on screen that time simply turn off and on the phone. most of the time this problem gets resolved by this method.

if problem persist try to do repair of your phone via PC campaign.