A camera in a dream often points to how you observe your own life, or how carefully you're documenting a memory you don't want to lose. A camera that won't work can reflect frustration at not being able to capture or control your self-image the way you'd like others to see it.
Entrust the Sun when you are depressed because it means renovation, growth, and quick response. - Picatrix (Andalusia, ~1000.AD)