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.
You must take in consideration that two opposite stars reinforce each other in the rulership of human beings, unlike the stars of fate. And this is what we take in consideration of all that was said by that man. - Picatrix (Andalusia, ~1000.AD)