notification sound

[kawkab]

Hi
I have a weird problem in sound sometimes the notification sound no more work goes silent i must do restart i did software repair but it come again what should i do

[Phy]

boot on safe mode and see if you experience the same issue

[Phy]

How to boot on safe mode.
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

[Thommo]

Have you checked Settings then Sound and then Volume or if you are using Lollipop then check Settings then Sound and notifications

[kawkab]

I have a weird problem in sound sometimes the notification sound no more work goes silent i must do restart i did software repair but it come again what should i do