My 980ti HDMI port has no problems with either my Vive or Rift (which have both been unplugged while trying to get my HP HMD to work). I've tried multiple USB 3.0 ports and 2 different Insider Builds (16232 & 16251). I've re-installed the software and run setup many different times.
The Mixed Reality Portal displays on my desktop and the tracking seems to work properly. The PC checklist shows all green checkmarks; the system recognizes the device and responds appropriately when I connect/disconnect the cable. But I've never seen anything actually displayed in the headset when I put it on.
It seems I have a defective cable or headset, but there is no option to exchange this unit for another one via my Microsoft Store account. What should I do?