Camera and camera apps wont load.

The camera wont load or any of the camera apps. I click the camera button and it flicks across to the camera screen but the camera icon is greyed out and then it quickly closes and returns to main menu. Same thing happens if I try and load from Camera app, Lumia Camera app or Nokia app, even my flashlight app does the same flash screen then it crashes. All other apps and editing of pic apps work fine. Have tried Hard Reset, have updated to Denim and have updated every app and reset the phone again and again etc.

Anyone seen this before?