having display problems with my macbook air, first version of 2015. When I turn on my macbook, after boarding the password, then press on enter three lines (not really they look more like flashes coming from the top of the screen appear) in

having display problems with my macbook air, first version of 2015. When I turn on my macbook, after boarding the password, then press on enter three lines (not really they look more like flashes coming from the top of the screen appear) in the colors Blue, green and red.

also when I turn off my laptop just until the display on the top of the screen that is 2 and a half inch thick green line appears and goes about a second.

help someone?

Thank you

Howdy Yaser of zoysia,

It seems that your screen displays some graphical anomalies when you connect to your user name. I would use these troubleshooting steps in the following article on the resolution of screens:

Restart your Mac in safe mode to reset the default display resolution.

If booting safe mode doesn't resolve the problem, reset your Mac NVRAM and SMC to reset the video ports on your Mac to their default values.

From: get help with graphics issues on external displays connected to your Mac.

Thank you for using communities of Apple Support.

Tags: Mac OS & System Software

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