Chosen Solution
I have a mid 2014 macbook pro and every once in a while there will be horozontal lines moving from top to bottom. I close the laptop, open it back up and they are gone for a few seconds, but then it continues to misbehave. Sometimes it will go days without doing it, and then again, for a few hours on and off.. I tried connecting it to an external monitor and i could see the display perfectly even when the laptop screen was acting up.. ive tried to upload a pic of it.. hope someone has a suggestions..
1)It is possible to occusers due to reseating errors of flex connectors inside Mac Book. 2) Excessive pressure damage-possible to isolate using known good Display 3) Main board malfunction - possible to isolate using known good Display If reseating a flex connector does not resolve the issue, proceed with modular repair or whole unit replacement. Similar issues, -No/distorted video -No backlight -Vertical lines -Image or backlight flicker -White screen
