Hi, we have two Mi Boxes. One bought at launch that came with Netflix problems and another one bought in May working fine.
However, both boxes are starting to go dark after they are turned on/awoken from sleep just to watch Youtube, in the main screen, etc.
Both boxes are on heavy use as we dont have cable.
I have began to think that the Mi Box is quality-build like any other generic chinese box, meant not to last more than a few months, if ever a full year. I think its internal connections may get damaged easyly if moved slightly.
Anyone with similar video issues? May be it is a firmware problem?
Try a different hdmi cord or a different port on your TV. I had issues as well and it took a few different cords before I found one that fixed it.