I had an older DC4 fail. These are the devices that take most of the daily switching abuse, so, yes, it's likely. Unless the green LED is fried too, it should be green or amber. If you had fallback states set, the outlets may be on based on that information.
I'm assuming this is an Apex Classic. I would log into the web interface (Not fusion) and goto "Configuration" "Module Setup"
Look on that page, and it will tell you what is communicating. If that EB shows missing, then indeed, its not communicating. Sounds like it needs replaced, they do have a repair service too.