Faint horizontal lines on the left side of the display.
Three days ago grey horizontal lines appeared on my Thunderbolt display. After a few minutes they disappeared only to appear again after a while. It happened three or four times and now they stay on permanently.
I connected the display to two different laptops and the lines were visible in both cases. I have also tried a new thunderbolt cable but it didn’t help.
Any help with pinpointing the issue would be appreciated.