I'm in the US.
Router is RT-AC66U
Good point on the router, though. This problem may have started when I swapped in the new router. It would be great to understand what that error message means. Sadly, I agree that these forums are not well supported by HP. At this point I have to turn the printer on (it thinks its off) and then print. Annoying but survivable until I can replace it.
Thanks for responding!
Craig