And just to round this thread out more in case anyone else Googles this later: I replaced my micro-HDMI>HDMI cable and that fixed it. I didn't even know that an HDMI cable could fail like that, it made the picture slightly grey and meant the resoluti...
Yea, not using an adapter. But had wondered if the cable might be the culprit as its behaving the same on my other PC too. WIll get a new one and check. Thank you for replying! This conversation might help some other people in future too!
Did you ever find a solution to this ThePeckishFox? Having the same issue now after unmounting and remounting my M200 for streaming, it's driving me crazy.