No response from sunroof dial. What do I check?

[Dorado]

Out of the blue, I could not open the sunroof this past weekend, and still can't. I turn the dial knob either way and nothing happens. Any basics to check?

I used the sunroof the week before, I don't recall doing anything funny with it when I closed it.

 

[jasonTDI]

Check the fuse first. After that, well.....