Brand new Surface Pro 3 connecting to Apple MC007LL/A 27 inch LED Cinema Display which has a MiniDisplay Port connector. There is an intermittent screen flicker (no particular apps running). From time to time the screen goes black for about a second, then comes back. The resolution is 2560 x 1440 which is "recommended". I use this screen all the time with the Macbook air with no screen flicker, so I doubt it's the cable connector. Any ideas?