Display Screen
Why are there vertical lines on the left side of my screen?
MacBook Air 13″, macOS 11.6
FTSname wrote:
Why are there vertical lines on the left side of my screen?
You mean like a fault.. typically it mean there is an issue with the display assembly or the GPU.
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"—
https://www.apple.com/retail/geniusbar/
Outside the USA
https://locate.apple.com/country
From iOS device using the "Apple Support.app” to make a online Genius Bar appointment is easy:
https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8
check your coverage: https://support.apple.com/my-support
Learn how to get your Mac fixed and how much it will cost. https://support.apple.com/mac/repair/service
Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095