Blue screen with vertical black lines after Apple icon startup
My MacBook Pro seems to boot past the Apple icon and progress bar at startup but then the screen goes blue with black vertical strips.
Booting in single user mode seems to say that it can’t read the hard disk but I have created an El Capitian bootable usb installer which has the same issue and have tried a different drive internally.
I ran a full Apple Diagnostic but this didn’t find any issues.
I have previously attempted to disable the AMD graphics card via Linux which was working fine.
Please can someone suggest the cause of this issue?
Is this a good question?