Shutdown loop

[Romaha]

 I upgrade my Z1 to 4.4.2 and get the next issue.

When I switch off my phone with long press power button -> "swich off phone", its successfully shutting down but after 5-10 sec. show startup SONY logo then swich off display then show logo again and so on endlessly... 

 It was very unexpectedly, when I swich off Z1 and put it into pocket, after cuple of days I found it totally discharged. I cant make phone alive with wall charger and only 2-3 hours on USB charger can reanimate Z1.

 Is there software problem with shutdown loop or problem with battery controller or something else? How can I fix it? Any considerations?

P.S. Small "force shutdown" button or Power+VolUp combination sometimes help to shutdown phone.

[Uliwooly]

Re-install the latest update with SUS or PCC

[Uliwooly]

Update Service (SUS)

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[Romaha]

Already done it two times.

One with PCC and another with SUS

[Uliwooly]

Remove both SD and SIM cards and check again 

[Romaha]

the same thing

[Uliwooly]

Restart your phone on safemode 

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

and check again 

[Romaha]

 After rebooting in SM and shutting down i cant see any difference, Shutdown Loop

[Uliwooly]

I'm sorry to hear that, you will have to stop by a Sony repair center 

http://www.sonymobile.com/global-en/support/contact-us/

[Romaha]

I gues so