Why are there red lines on my MacBook Pro 2020 screen?

My Macbook pro 2020 screen shows red lines horizontally on the top and bottom when watch videos on safari on YouTube on full screen It does not do the same on chrome and even when I watch on video player on my laptop.


[Re-Titled by Moderator]



Posted on Mar 20, 2025 12:10 AM

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2 replies

Mar 20, 2025 3:09 PM in response to ekene146

ekene146 wrote:

My Macbook pro 2020 screen shows red lines horizontally on the top and bottom when watch videos on safari on YouTube on full screen It does not do the same on chrome and even when I watch on video player on my laptop.

[Re-Titled by Moderator]



Seems odd—


I would use what works better. Not sure what else to say about this anomaly...


you can try a SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies


Does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, third party system modifications and system accelerations are disabled temporarily.


Login and test. Reboot as normal and test. Caches get rebuilt automatically.



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 Support - Apple Support



Call Customer Support (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

or call AppleCare Support at 1-800-APLCARE (800-275-2273)


Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

Contact Apple Support - Apple Support


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Why are there red lines on my MacBook Pro 2020 screen?

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