Camera view screen flashing
Enthusiast - Level 1

hello, I need help.  My Camera screen has started flashing from what I am looking at to just black.  It is like it is going on and off.  I have restarted my phone several times and nothing has changed.  When it first starts going from the view screen to the blackness the number 5599 appears in the lower right hand corner. Can anyone tell me what is going on? oh and my battery life is at 50%