Real question is, was the previous image openVIX or openATV?
I've heard that if your on openVIX then you update the box can be bricked.
before you do anything, make sure you have the line.
once you have that, go ahead and reflash the image (whatever you was using before)
when its all set up again turn off the auto updates maybe worth setting up the parental controls so he doesn't accidentally update again lol