Strange problem

[madelajna]

I have very strange problem with my Xperia. When I make phone calls the screen locks up and I can't  do anything. I have to remove battery and turn it on again. Can I fix it myself or should I take It to the service?

Sorry for my english by the way  

[_alexdon_]

Can you check if the same occurs in safe mode?

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

[madelajna]

I checked. The same occurs in safe mode.

[_alexdon_]

You may need to perform a software repair using PC Companion.The process will erase all internal memory.You might need to charge your device for about 1-2 hours before so the device has at least 60% battery.

Make sure the device is not connected to computer or laptop and turned off (sometimes you have to press power button and volume up until the device vibrates 3 times or on some devices you have to press the small button near the SIM tray or on the back of the device).

Open PC companion->support zone->phone/tablet software update->repair my phone/tablet blue highlighted.Follow the steps given,do not connect your phone until prompted to press volume down while plugging USB cable. If PC companion does not start the repair process, you might need to run it in compatibility mode with Windows 7 (in some cases XP).

[Uliwooly]

Don't forget to backup 

Alternatives on How to backup Xperias

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

[madelajna]

Allright. I'll try.

[madelajna]

I did it and it's still the same. Any other ideas?

[_alexdon_]

You should take it to a sony service:

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