Why won't my Nokia Lumia 720 screen turn on?

[WPCentral Question]

my screen will not switch on, Nokia Lumia 720

It was working fine in the afternoon and since the day of purchase and then I plug it into my laptop then the screen wont switch on. When I connect it to the laptop I can access the contents on my phone and I cannot reboot it, because of the screen

 

[jontyfernz]

Re: my screen will not switch on, Nokia Lumia 720

Windows 8?