https://community.sony.com.mk/t5/xperia-archive/look-screen/m-p/3379964#M481662 <P>Changed the display, Do you mean installed a new LCD? - If you have then you may not have put it back together correctly or you just need to perform a system repair</P> <P>Performing a system repair using <A href="http://www-support-downloads.sonymobile.com/Software%20Downloads/PC%20Companion/Sony%20PC%20Companion_Web.exe" target="_self" rel="nofollow noopener noreferrer">PC Companion</A> will factory reset your phone and erase all data so best to backup before you begin<BR /><BR />Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)<BR />Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the on screen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process<BR /><BR />If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP</P> Tue, 03 Mar 2015 20:35:01 GMT Thommo 2015-03-03T20:35:01Z https://community.sony.com.mk/t5/xperia-archive/look-screen/m-p/3379963#M481661 I have changed The Display! Now i have a Problem. When i Startes The phone all is good but when The Look Screen comes i CAN not Look it with The power on Button. The Screen is Black. When i Plug in The USB cabel The Look Screen Come and i CAN use The Phone. Thank YOU for The Help!!!! Tue, 03 Mar 2015 20:31:11 GMT https://community.sony.com.mk/t5/xperia-archive/look-screen/m-p/3379963#M481661 Löwe1860 2015-03-03T20:31:11Z https://community.sony.com.mk/t5/xperia-archive/look-screen/m-p/3379964#M481662 <P>Changed the display, Do you mean installed a new LCD? - If you have then you may not have put it back together correctly or you just need to perform a system repair</P> <P>Performing a system repair using <A href="http://www-support-downloads.sonymobile.com/Software%20Downloads/PC%20Companion/Sony%20PC%20Companion_Web.exe" target="_self" rel="nofollow noopener noreferrer">PC Companion</A> will factory reset your phone and erase all data so best to backup before you begin<BR /><BR />Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)<BR />Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the on screen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process<BR /><BR />If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP</P> Tue, 03 Mar 2015 20:35:01 GMT https://community.sony.com.mk/t5/xperia-archive/look-screen/m-p/3379964#M481662 Thommo 2015-03-03T20:35:01Z