Hi guys I've have my SP3 for a few days now and so far i'm enjoying it alot! But.... one small issue has popped up. When my surface is connected to my external display (by mini dp) and i connect the a/c cord I get a loud 'popping' sound with white static like artefacts appearing on the screen for a moment. I've put a video up so you can see and hear what I'm talking about. Has anyone had any issues like this?