Okay, this one is a doozy. I've spent weeks on this issue with little to no progress. Let me explain this from the beginning.
I saved up some money and wanted to buy a Vive because my friends each had one, and because it was upgrade-able with leg trackers. I didn't have the money to buy one brand new, so I went on ebay. I found a seller who was selling one. It was, according to the listing, fully tested, guaranteed to work, in great shape, and included everything. The seller had a 100% satisfaction rating from the 2,000+ sales he'd done, so I bought it. After it arrived, I set it all up, and major problems started happening. For one, nothing was displaying in the headset. Additionally, SteamVR was giving an HDCP error. Plus, the screen did turn on twice, only to display a white screen with some weird red lines.
At this point I thought "Oh, the screen and its connectors must be damaged", so I contacted the seller and told him this. He sent me another headset, just the headset part. I hooked it all up, and the same problems started happening again. The only difference was that the headset didn't display anything, not even those weird red lines on a white screen. I realized that something SteamVR-related was the culprit, not the headsets. I did the first thing I think to do in these kinds of situations and look online. I found plenty of solutions, none of which worked. So I started trying... everything. A week of doing nothing but trying solutions passed and all the problems are still happening.
Today, I decided to completely uninstall both Steam and SteamVR from my computer, reinstall them, then try again. To my surprise, this fixed the error messages and made my computer recognize all the hardware! Perfect, except that the headset's display still doesn't display anything. Previously, launching any VR game would cause the game to crash, probably because of what the error messages were telling me. However, now launching any VR game works and it doesn't crash.
I should mention that the trackers, base stations, cables, controllers, and link box all work perfectly. If I enable VR View in SteamVR, I can see what the headset should be displaying, and moving the controllers and the headset does what you'd expect it to. Also, my GPU usage shoots up to 80%, something I'd expect, except nothing is displaying inside the headset. I'm at wits end. I've honestly and truly tried everything, but this is the furthest I've gotten. No errors, all hardware detected, games work, but no headset display. I opened up a support ticket before I fixed the error messages, and I've waited a week for a response, so I decided to post my past and current issues here. Can someone please help me? I know that setting up Vives is harder than other headset brands, but I didn't expect to have to spend weeks and it still isn't set up.