Why isn't anything appearing on my screen after I turned on my phone for the first time?

[Windows Central Question]

Why isn't anything appearing on my screen after i turned on my phone for the first time?

I charged my phone and turned it on for the first time and the only thing that shows is the back key, menu key and the home tab. when i press the menu key, nothing shows, when i call the phone it goes through. it's nokia lumia