Power is on but wwont turn off, no response to functions

The power light is on a solid green on the unit. However, there is no indication that it is responding to anything. Nothing happens when a button is pressed on neither the remote nor unit itself. We can't even turn the power off by the power button on the unit or on the remote. And since the unit is installed in the ceiling, we don't know if there even is a plug. But if there is one, it is encased in the pole that attaches the unit to the ceiling.

I hope this problem makes sense to someone and that there is an easy solution.