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.
Men may be said almost to be compelled by the Stars, even in voluntary actions, by means of their corrupt affections and ignorance. - Cardan Girolamo (1501-1576)