ZTE Blade S6 stuck on black screen

A

AC Question

My phone is stuck on a black screen. The pull down menu works and fills the screen so its not a case of the screen malfunctioning. I can still receive phone calls and notifications still appear in my pull down menu but the screen stays black. I can't open anything in my phone or respond to any notifications. It appears to be a software issue but I don't know how to fix it. Please help!