I have no idea how to describe what the issue is, I consulted people on discord and was told it could be an issue with the backlight.
The issue is most visible on grey, then white. Not visible on black, least visible on blue.
I noticed it today, and even though I feel like I would've noticed it earlier, there's a non-zero possibility it was there before.
The line aligns with my browser's top bar (tabs + url bar) but maybe it's a coincidence? Since it's not an OLED this can't be burn in, and the OSD doesn't have LCD conditioning as an option
Things that come to mind:
- I vacuum cleaned recently to get dust off the top (not the best idea, I know)
- I moved my monitors around on the desk a few times these past few weeks, I put pressure on the right side once while not being careful enough
- The sun in the morning hits it, though it's always through curtains
If it's repairable, great! If not, and it doesn't mean monitor death in the near future, I'm fine with it as long as it doesn't get any worse