This is similar to a Recovery Partition Boot but it downloads the software directly from Apple to boot from, just in case there is something going on with your Hard Drive.

Boot to OS X Internet Recovery (to see if it is a software issue)

Step 3: While holding down Command and R press the power button and continue to hold down the Command and R keys until you see the Mac OS X Recovery tools show up. Step 4: Hold the Option, Command, P, and R keys down until the computer restarts, then release. Step 3: Press the power button while continuing to hold the keys mentioned in Step 2. Step 2: Hold down the Option, Command, P, and R keys. There was a major flaw in the AMD Radeon GPUs included with that model year's logic board which seemed to cause GPU failure either due to overheating, internal chip problems, BGA solder joints getting broken, or a combination of the above. They did have me go through the following troubleshooting steps: Reset the PRAM The 2011 MacBook Pro has, for almost a decade, been the exception to that rule. Finally I got a senior adviser and he took my word for it and made an exception and covered the issue under my expired AppleCare. I told the guy to check the chat session but he said it was not available and that only a senior adviser could even make that kind of promise, so I asked to talk to one. The Apple tech call came in and when I brought up that they were going to cover it under my expired warranty the guy said that they would not be able to. I kept the chat open and waited for the call, but then my computer shut off. Then they said I’d need to talk to a phone representative and scheduled a call. The tech on the chat said they would be able to cover it, to my great relief. My biggest concern was seeing if I could be grandfathered under my expired AppleCare since this is a widely reported issue. When the first signs showed up, I quickly got on a chat session with an AppleCare representative.

Macbook pro 2011 graphics card problem