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Turned on my Macbook Pro 17" 8,3 the other night and the screen looked like this.
I called Apple, and the tech had me do a couple of commands which fixed the issue. But I'm trying to figure out that happened. Is it the graphics card? The HD?
I'm running the latest version of El Capitan.
MacBook Pro (17-inch Late 2011), OS X El Capitan (10.11.1)
Make an appointment at an Apple store genius bar. This applies to your MBP:
https://www.apple.com/support/macbookpro-videoissues/
Ciao.
What were the commands?
Vertical lines on screen on startup
