Share your experience!
does this happen on both your phone and a computer?
It seems that you have an app that is acting up
Does this happen while on safe mode?
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
if it doesn't then its an app acting up
it's alright now. i've pressed the power and volume up buttons and it worked..
I'm glad to hear that