https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528823#M2777 Boot in safe mode and see if you experience the same issue.<BR /><BR />How to boot on safe mode<BR /><A href="http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008" target="_blank">http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008</A><BR /><BR />How to boot on safe mode on Lollipop<BR /><BR />1. press and hold the power key<BR />2. once you get the pop up menu&nbsp;<BR />3. press and hold "power off"&nbsp;<BR />4. Boot on safe mode should become available Sun, 15 Jan 2017 19:16:15 GMT Phy 2017-01-15T19:16:15Z https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528822#M2776 I have a problem with my Xperia e4. When i lock my phone, it turn off automaticaly. Please help me with my problem. Thanks<BR /> Sun, 15 Jan 2017 14:59:20 GMT https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528822#M2776 thexperier 2017-01-15T14:59:20Z https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528823#M2777 Boot in safe mode and see if you experience the same issue.<BR /><BR />How to boot on safe mode<BR /><A href="http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008" target="_blank">http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008</A><BR /><BR />How to boot on safe mode on Lollipop<BR /><BR />1. press and hold the power key<BR />2. once you get the pop up menu&nbsp;<BR />3. press and hold "power off"&nbsp;<BR />4. Boot on safe mode should become available Sun, 15 Jan 2017 19:16:15 GMT https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528823#M2777 Phy 2017-01-15T19:16:15Z https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528824#M2778 You can also repair the phone with<BR />Sony Xperia Companion and check if it no longer turns off when you lock the phone.<BR /><BR /><A href="http://support.sonymobile.com/global-en/tools/xperia-companion/" target="_blank" rel="nofollow noopener noreferrer">http://support.sonymobile.com/global-en/tools/xperia-companion/</A> Sun, 15 Jan 2017 19:18:13 GMT https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528824#M2778 Phy 2017-01-15T19:18:13Z https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528825#M2779 <P><A href="https://community.sony.co.uk/t5/user/viewprofilepage/user-id/932021">@thexperier</A></P><P>Do you experience the same without the SIM and SD cards?</P> Sun, 15 Jan 2017 20:06:55 GMT https://community.sony.cz/t5/e-series/my-xperia-e4-turn-off-when-lock-my-phone/m-p/3528825#M2779 Uliwooly 2017-01-15T20:06:55Z