Z2 does not start anymore

[Steven1985]

I turned it off today and later tryed to turn it back on.

It starts but when these waves apear it takes a couple of seconds and it starts all over again

HEEEELP me please

oh and i already tryed to reboot via holding power an volume up button  NOTHINHG

[Hampus]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

I suggest that you try to start your phone without SIM- and SD-card. But if you still experience this behaviour, a software repair via PC Companion would be recommended:

http://www.sonymobile.com/global-en/tools/pc-companion/

In PC Companion you press start on Support Zone > Start on Update the phone/tablet software > Repair phone/tablet (the blue clickable link in the message) > Follow these steps without having your device connected to the PC.

Follow the instruction that appears in the program and do not connect your device until this guide tells you how to connect it.