The LED light ring on the Highfive device can tell you what the device is doing. Here's a key to help you understand what state your device is in:
No lights: Not in a call (device may be powered off or if it is powered on, it is not picking up any audio or video)
Stationary purple/blue lights: In call or initial boot phase. If brand new, the device is waiting to be provisioned.
Rotating purple/blue lights: Software error (Example: "Unable to connect to Highfive servers" error seen on TV screen) or the device is in the process of starting up.
Solid red: Hardware error. Please contact firstname.lastname@example.org to report the issue.