Xperia Z keeps switching itself on and off incessantly

[fbell14]

Hi,

My phone has all of a sudden just started to turn itself off and back on again constantly, I have just rebooted it by holding down volume and power it and it has thankfully not switched itself back on, is there any way this can be fixed? I have not plugged it into the charger as this causes the prpblem to continue.

Cheers.

[_alexdon_]

Do you have any battery saver,task killers,antivirus?Boot your phone into safe mode,see if that occurs:

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

[fbell14]

I have got it into safe mode but it still keeps switching itself on and off, at one stage I switched it off again and it made a high pitch frequency noise and the screen faded a bit like an old television exploding, it was like something out of a horror movie, I have got mcafee antivirus on there but can't get the phone to stay on for long enough to get rid of it.

[_alexdon_]

Download sony update service and attempt a repair(make sure your battery is at least 60% and backup your important data,because it will erase phone memory).

[fbell14]

What is the best way to back up my data? this is proving difficult as the window which the phone is active is really tight as it keeps turning on and off

[Uliwooly]

If your phone keeps restarting its almost impossible to back it up

Update Service (SUS)

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

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

[fbell14]

I have updated the software ad it is still switching itslef on and off, it's absolutely knackered

[_alexdon_]

Tomorrow take it to closest sony service.

[Nabeel]

I experienced such behavior on my Xperia Arc S when water got into the power button. I allowed my phone to dry for 2 days before it became normal.

Although Z is a water resistant but did you submerged it in water or like that ?

I'd say try to run your phone without sim card to see if it works.

[fbell14]

Had absolutely no water near my phone whatsoever, it has me baffled, if I had dropped it on the pavement or had it in the shower I would admit to it and would feel a bit guilty but its started malfunctioning completely at its own accord, it has been sent away to be repaired now, it became even more inactive after the software was updated.