I try to start to life again a MacBook Pro from around 2012 (model A1286).
What I observe:
- It won’t reach login page (even with combination like Option/Cmd/R or Option/Cmd/Shift at boot time).
- Display is blurred with thin vertical lines then freezes on a light grey empty screen.
- Alternatively, I can start with the “mappemond logo”/Network selection but not further than this screen.
- If I start from a bootable USB disk, I get a blurred screen and it freezes just the same.
I’d like to find a way to make a correct diagnostic of the situation: screen problem? video card problem? Something else? But I don’t know how to start this kind of checkup.
Any help would be highly appreciated.