Why won't my S5 Sport lock when the button is pressed?

[James Ashley]

s5 sport wont lock when button is pressed?

I can hold it down to have the power options come up but I cant get it to lock even tried safe mode please help!!

 

[B. Diddy]

Re: s5 sport wont lock when button is pressed?

Do you mean the screen won't turn off with a tap of the Power button, or that the phone won't go to screen lock after pressing Power to turn the screen off?