What Could Be Causing Black Vertical Lines on Monitor All of a Sudden?

[Jennifer Aniston]

Recently, I started seeing black vertical lines on monitor even when nothing has changed in my setup. Could this be a hardware issue, cable problem, or GPU-related?

 

[Kian]

Black vertical lines on a monitor can appear due to loose or damaged display cables, GPU issues, outdated drivers, screen panel defects, or physical damage. Testing cable, updating drivers, or using a different monitor helps identify hardware or software faults.

 

[royjasika]

Black vertical lines on a monitor can be caused by loose or damaged cables, GPU issues, or a failing display panel. Check HDMI/DisplayPort connections and try another cable or device. Update graphics drivers on Windows 11 or Windows 10. If lines remain on all screens, the monitor itself may be damaged and need repair or replacement.