I had this monitor for 4 years. Today I have noticed this strange blackish line that looks like hair. The pixels are good, there are no deadpixels - this seems like it's "behind" the pixels panel.
It can be seen at all times (except on the black screen), it's the worst on the white screen though.
Here's how it looks like.
Hopefully someone here could help me with this. What is this and what can I do to fix it? Thanks.