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.
The Moon hath a certain natural mutability, therefore she easily communicates to us the Influence of the other Stars. - William Lilly (1602.-1681.)