Yesterday I noticed the DisplayPort of my Surface 3 is no longer working properly: I've tried with two different mDP-DP adapters and three external monitors, both with HDMI and VGA, with same results: as soon as I connect the mDP cable I can hear the new device notification sound, the Display Settings shows two monitors, but if I press 'Identity' both '1' and '2' are shown in tablet's display, pressing 'Detect' shows 'Didn't detect another display', and no output on external monitor. I'm sure I was able to use external monitors some months ago, but I didn't try anymore until yesterday. Windows 10 has got all the updates so far (up to KB3206632 December 2016), Intel HD Graphics driver version is 18.104.22.16824. Is anyone experiencing the same? Thank you.