Power\lock button does not working

[Aspong]

I have just tried to unlock my phone using the power button and the phone is completely unresponsive. I have tried connecting it to the charger, pressed the reset button, everything I can think of the screen is completely black. The phone is still on as it keeps vibrating to tell me I have messages and my colleague tried to ring me and it rang and vibrated, but the screen stays off...

Please help me! I haven't done anything, it has been sitting on my desk all day, it hasn't been near water, been dropped nothing. It's only about a month old...

Thanks!

[SVK]

You know what, I got a similar problem like this. My screen display not worked properly. Notification tones was there but not able to see the screen. Additionally I got a problem like when I press the power button long, I was not getting the shut down and other options. I was trying many ways to resolve this. But finally I just tried one simple way. Removed my SIM card and inserted again Now everything is working properly.

[lecnier]

it does not work at all... if i connect it to the charger its automatically power on at the it appears only 10 seconds ang power off again.. if i disconnect the charger it does not power on... 

what should i do,.. help me please...

[Elesa]

Can Sum1 pls help.... My power button works to switch off and switch on d screen... Bt its not working for switching off the phone.. Wat do I.do? My model is c5302 Xperia sp .

[GodOfTheUnderWo]

Thank you so much for the answers it really help!

[Tanmaydas]

hallo sir,,i have a sony xperia e4 dual n having an issue on its power button its not working,,,,what can i do for it please suggest me a solution

[destincarinna]

I have xeperia c3 that the power\lock button does not working. Please help me how make it back to normal.