Has anyone had this issue? I've searched and have viewed some issues that may be similar, but no solution. Furthermore, all of the others who took their monitors to the Apple store, reported that the Apple store found nothing wrong. I'm out of my warranty stage and I would hate for the $1,000 monitor to cease functioning. It doesn't happen all the time either. It has happened, out of the blue after a couple of years, twice in the past week. last night it was mild-severe. it's functioning perfectly fine right now, however. Any ideas? Thanks in advance.