It is giving us some real grief this season. I gave it a good clean, refocussed and reset all the settings when I was there for Easter.
It worked fine and looked wonderful until I got home when it stopped working again.
Moral of the story: Don't come home!
I'm working on a couple of things that may help but it's going to take a little while. In the meantime we have to rely on Adriana turning the thing off and on again which usually (but not always) does the trick.