Vertical & horizontal lines all over can’t log on
Vertical& horizontal lines all over screen can’t log on no icons etc
MacBook Pro (2017 – 2020)
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This seems like a hardware error to me. Please try and boot in the safe mode to see if this problem is persisting
- Turn on or restart your Mac, then immediately press and hold the Shift key until you see the login window.
- Log in to your Mac.
- You might be asked to log in again.
- On either the first or second login window, you should see “Safe Boot” in the menu bar.
In the safe mode, external apps are not loaded so if this is a problem caused by external apps the problem will not occur in the safe mode. If the problem is persisting this is most likely a hardware issue with your MacBook. Please Contact - Official Apple Support to set up hardware service for your device