facing problems wit the lock button

[silvermoon]

I have an xperiaZ.  N the screen lock button is not working. Wht should I do??? To unlock the screen I press the volume button thn it gets unlocked. Plzz help me wit a suggestion asap?? The volume is also bcum very low

[Henke]

That seems strange, have you tried to do a repair of the phone software?

Click on this link to get Sony PC companion:

http://www.sonymobile.com/gb/tools/pc-companion/

Start PC companion, start "Support Zone", start "Update phone software" and click on "Repair".

Follow the on-screen instructions.