Philips 346p1crh - dark vertical line in middle of monitor, no idea what's the cause

Hello, recently my Philips 346p1crh decided to show a dark vertical line in the middle of the monitor. The weird thing is that it shows randomly, but most of the time within an hour.

I want to search online for solutions, but I don't really know what part of the monitor is failing here, I assume the backlight? It is really noticeable during normal use and I was hoping to get it fixed.

Any help or information would be greatly appreciated!