Strange illuminations at the edge of the display

Hi everyone!

This is my first post here so I hope I’m doing well.

To my problem, my Apple Thunderbolt display 27" got out of the blue these strange lights on the left edge of the display and also a small orange line on the very outside. It can not be due to the connected macbook pro, this problem also occurs with a different scaling.

Have you had any experience with such a problem or what do you think is the problem, the blacklight or the panel itself?

For more pictures, just tell me.

Thanks in advance for your help!