I have the Vive Pro and I was in the middle of a game not moving. When my screen turned grey then black and would not come back on. I looked at the SteamVR window and every icon was grayed out. I then examined my link box and noticed the light on top that is usually green was not on at all. I tried to troubleshoot using different USB ports, I even swapped power supplies with the one I had for the old link box on the regular vive headset. None of this has worked and now SteamVR does not detect anything. (Picture Attached) The link box light no longer turns on so I believe it is that. But I just need some further help to get this working since changing the cables did not work.