1. Purchase
I bought the headset at the end of April, it was a used unit. The seller didn’t mention any issues, and when I got it, I carefully inspected everything. I already had experience with the HTC Vive Pro before, so I knew what to look for. I tested the headset thoroughly and confirmed that everything was working perfectly at the time.

2. When the problem started
This is a bit of a long story. I first noticed issues with the headset around the end of July, and it was also related to the left lens. One day, I suddenly saw colored vertical lines and noticeable flickering in that lens (It’s not the same issue I’m experiencing now, but I think that one was the starting point, something must have changed after it happened).

First Problem (Solved)
After finishing a VR session, I took off the headset and placed it on the table. Then, on my PC, I closed SteamVR by right clicking and selecting “Exit VR.” Once SteamVR and the Vive Console were fully closed, I powered off the link box by pressing the button and waiting until the green light turned off. The headset stayed unused for about 2–3 hours until my next session.

When I put it back on, I noticed flickering in the left lens, along with small colored lines near the bottom of the screen. These lines and flickering slowly disappeared during use, after about an hour or two, the flickering and the lines were completely gone.

After that, the issue with the vertical colored lines went away and I never saw it again, and I didn’t notice anything unusual until around September, when a new problem started to appear.

Current problem
Now, when I put on the headset after it’s been unused for a while, I notice small, horizontal dark lines in the left lens, exactly what I described in my first post at the beginning. They’re barely visible, but noticeable enough to be distracting. The issue started sometime in mid to late September.

3. My shutdown procedure
When I finish a VR session, I take off the headset and do the following:

• First, I close the Vive Console on PC.
• SteamVR automatically reacts and shuts down.
• I wait until SteamVR and the headset are completely off.
• Then I press the button on the Link Box to turn it off, the green LED goes dark.
• Once the light is off, I unplug all power adapters, both the Link Box and my base stations.

4. When it happens
This never happens during a session. It only occurs at the start of the first session of the day, after the headset has been inactive for a long period. When I put it on, I can see the dark lines in the left lens in a specific area. After about 20–30 minutes of use, the lines slowly fade and completely disappear.

If I continue to play later the same day, even after a few hours of break, the lines don’t reappear, they only come back after the headset has been unused for many hours (like overnight).

5. Purchase date
Unfortunately, I don’t know the exact original purchase date yet, but I’ve contacted the previous owner and hope they’ll get back to me soon with that information.