My power button isnt responding.

If you phone is still under warranty, I'd suggest that you go to Nokia's customer service in your area. From what I can read on the internet, it should not take long to fix.

Sent from my Huawei Ascend G300 using Tapatalk 2
 
On my 820 my power button stopped working once. I hit it against a steel girder. Haven't had a problem since.

True story.
Sent from my RM-824_nam_att_101 using Tapatalk
 
First, i dont have warranty or nolia store near me,but today the power button started to respond after i press 2-3 times
 
My power button is not responding after 8.1 (Lumia 720) developer update. I am using Camera button to unlock the phone.
Is it Hardware problem or issue with update?