I just got a Cable Matters mini displayport to hdmi/vga/dvi adapter from Amazon. I am using it right now on my Asus monitor. However, it will not work unless the SP3 is lying flat! I have checked the connection, and when flat I can yank the cable all around with no loss of connection, like even pulling around the tablet by it - no problem. But as soon as I lift SP3 up at all it loses connection and reverts to SP3 display. I just have to BARELY lift it. I think it must be the accelerometer or gyroscope (not sure exactly how it measures this stuff). Has anybody heard of this?