It seems that a significant amount of people are having their Sony Xperia Z handsets just die out of nowhere. Some can be revived (by holding power and volume up), some never come back to life. It seems we have another sudden death issue on our hands. So far, people have not found a link between all the deaths. Some people’s devices die, some don’t.
Luckily, Sony responded to the issue. They have found a fix and will be releasing it eventually as a system update. This leaves people with dead phones to deal with warranty and not having a cell phone, but at least others might not have to suffer the same fate. Hopefully the update will come out soon, because this isn’t the kind of publicity Sony needs in the race to get to third place (behind Samsung and Apple).