home screen button not working

[babab]

home screen  button not working

[MarlonUk1]

http://talk.sonymobile.com/t5/Xperia-Z2/Touch-screen-problem-Home-Back-Recent-Apps-buttons-not-worki...

http://talk.sonymobile.com/t5/Xperia-Z3-Compact/On-screen-buttons-don-t-work/m-p/982986#M10704