SOLVED: MacBook Pro 2017 screen flickering / glitching / has horizontal lines - MacBook Pro 13" Touch Bar 2017 - iFixit
![Fixing M1 Mac External Display Issues (Flickering Screen, White Noise, Black Screen, etc) | OSXDaily Fixing M1 Mac External Display Issues (Flickering Screen, White Noise, Black Screen, etc) | OSXDaily](https://cdn.osxdaily.com/wp-content/uploads/2021/06/m1-mac-external-monitor-issues-610x298.jpg)
Fixing M1 Mac External Display Issues (Flickering Screen, White Noise, Black Screen, etc) | OSXDaily
![Macbook Pro screen goes black/flickers + weird touch bar issues when plugging in second monitor : r/MacOS Macbook Pro screen goes black/flickers + weird touch bar issues when plugging in second monitor : r/MacOS](https://external-preview.redd.it/xl74_ctdS4g6ClsM3jsAorCYQ4T-3rFo3l4oj_xp0Fo.png?format=pjpg&auto=webp&s=1da991f28db7a7ab0aa5a76e4f0058dfd2b9f1f8)
Macbook Pro screen goes black/flickers + weird touch bar issues when plugging in second monitor : r/MacOS
![display - Why does a Macbook pro's internal screen flicker ONLY when it is on a GPU? - Ask Different display - Why does a Macbook pro's internal screen flicker ONLY when it is on a GPU? - Ask Different](https://i.stack.imgur.com/XO0fZ.jpg)