There has been an issue with the chip for this MacBook. I just called Apple, I know silly, of me to even consider after all these years, but I was outside the "recall" time for this model, expected though. Poster up there has the ticket though . Use it as a desktop. Good luck and here's the link!
http://gizmodo.com/5061605/apple-confirms-failing-nvidia-graphics-cards-in-macbook-pros-offers-free-repairs-and-refunds