Share your experience!
hi my friends,
I did an update and I am afraid it's failed.
now, my Xperia doesn't power on and I just have white light on notification light.
waiting for your help.
thanks,
Alex
Make sure you charge the phone at a wall socket for at least 2 hours,retry the update with SUS:
http://www.sonymobile.com/gb/tools/update-service/
the phone was full charged...
Retry the process then with SUS.
update: I don't know what happened but he is powered on now...
thank for tring to help 
Is it also updated?
I am not sure about it.
I am still on version 4.4.2 of android but the update that was in Update Center disappeared.
Whar firmware version do you have now?Does it coincide with what update centre showed?
17.1.1.A.0.402 ?
Was the same before the update?Or you do not know?