My Nokia Lumia 635 lock/unlock button won't work, how can I fix it?

[Khepri1]

My Nokiea Lumia 635 lock/unlock button wont work, how can I fix it?

The only thing that the button works for is to turn the phone on or off. It wont turn the screen off or on now just works as a power button.

 

[Chintan Gohel]

Re: My Nokiea Lumia 635 lock/unlock button wont work, how can I fix it?

The only thing that the button works for is to turn the phone on or off. It wont turn the screen off or on now just works as a power button.

the internal mechanism might be loose - show it to a phone technician