One of two cameras not connecting

[Saffro]

One of the cameras is not connecting. Have disconnected and reconnected. One camera connects no worries and the other does not. Is there something I’m doing or could there be a problem with the camera?

[jguerdat]

It's certainly possible that there's a hardware problem. Does the camera LED flash blue when inserting a battery? Does it flash slow blue when trying to sync? What exactly have you tried and what do you see?