I bought my Macbook Pro 15" early Feb of 2011. Last year, I've customized it to a 1TB Hybrid Drive and 16gb RAM. Recently I had problems with it (gray screen no logo) and particularly on the graphics (distortion). Recently I ran into this Repair Extension Program https://www.apple.com/support/macbookpro-videoissues/ To cut the story short, I brought it to apple store for repair and they said it was covered by the warranty. They ended up replacing my Logic board. Replacing my 1 TB Hybrid Drive to a standard SATA 500gb HD, and my 16GB RAM to a 8GB RAM. Without any costs on my part. (WHICH IS AWESOME!) When I asked the Genius Admin, he just said that 16gb causes issues in this system. And they only recommend 8GB. Why? It worked fine for me. Also for the HD, the notes says BAD SECTOR that's why they replaced it. But when I got home put the hybrid disk (they returned my old HD and RAM) in an enclosure and run the utility disk tests on it, everything was fine. So I guess my questions is, was my HD really damaged? and 16gb RAM causes problems for Macbook Pro early 2011?