Yep, tha'ts the issue. Thanks for the video. Flash of logo the first time and poof. The njust quick screen flash but no mal app. I gather it works with the MS mira-cast wireless dongle thing, but native miracast, doesn't matter the display as I've tried 3 of them all different brands...and bigger issue of me, is HP's lapdock in wired or wireless mode. Also happens with LUmia 950 with native mira-cast wireless, so it's not an X3 thing, it's the app.