Gabolriella wrote:
The laptop screen displays a vertical line from top to bottom, approximately 4 inches in width. This rectangular area has a noticeable darker shade compared to the rest of the screen. What steps should be taken to rectify this issue?
https://discussions.apple.com/content/attachment/f29d9f50-58d9-4767-9318-dba182ffc516
[Re-Titled by Moderator]
You have a hardware issue
Vertical lines are almost always a fault in the display itself.
You can compare your results plugging in an external monitor and compare your results
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment
Make an appointment for a "hardware issue"
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