A number of Sony Xperia Z users have reported their devices suffering from sudden death. Apparently, Sony's flagship has been shutting down for no apparent reason with subsequent efforts to bring it back to life proving unsuccessful, save for a hard reset in a few cases.
There is no particular reason for the occurrence. Some users have blamed low battery for the issue, but others have had their Xperia Z expire with plenty of charge left in its battery.
Sony has acknowledged the issue and promised that a fix is in the works. It will be delivered to the users via an upcoming software update.
I have sony xperia z c6603 but its not start up without charging. Tell me guys it is software or hardware problem?
Mine has just done the same thing, your comment sorted it. Thanks :)
My phone just died. no life whatsoever even when charger plugged in. I had read a spam email just before it crashed and was so scared it had a virus. Tried the power and volume up and VOILA!!!! before I could even work out how I could rub the screen ...