Screen is flashing lines in 5 columns
My screen is flashing colorful lines in five different columns.
MacBook Pro 15″, macOS 14.5
Question marked as
Jmcm85 wrote:
My screen is flashing colorful lines in five different columns.
you have a hardware failure. Display/Display Assembly/Display Cable issue...
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"
Genius Bar Reservation and Apple Support Options - Apple
Outside the USA
Contact Apple for support and service - Apple Support
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
you can plug in an external monitor and compare your results.