Originally Posted by the helper
Hi I have had a similar problem. Phone will not start, just black screen when the start button is pressed. As the phone has been in my pocket, I think that it is an overheating problem. After a couple of minutes it cools down and then it starts as normal.
Hey, sorry didn't reply earlier! Hmm that sounds like a hardware problem. If you are in the UK, overheating is usually
a valid reason for an exchange; especially if it causes reboots. Maybe try take it back to where you bought it from and get an exchange. I did so and got another Z2 but my second one had a battery problem as well.