Cannot accsess diagnosis

[Corazu]

My Xperia Z1 dont work properly anymore.
When i'm Going on diagnosis then comes this message
: Diagnose wurde beendet.

Well it delete some music from the intern memory. Please help me...

[Uliwooly]

@Corazu

That's odd, boot on safe mode and try again

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

[Corazu]

Not solved... What should i do now?