Antwoord op "My Lumia 920 died. Why is it not charging or starting up?"on its own my Windows 640 XL wont switch on. only when i have connected the phone to my laptop does it come alive.have also tried to use a different laptop but with no solution.there is an app on my laptop called Windows phone app for desktop .i suspect it enabling the start up. need a solution for the phone to be self starting.