I have the late 2011 MacBook pro 17 in. The logic board was replaced a year or so ago for the famous graphics chip failure that everyone has. I also replaced the hard drive at the time with an SSD. The computer appears to be doing the exact same thing it did when the logic board failed, I don't doubt that the Apple store in my area maybe didn't actually do the repair, they are particularly incompetent at this location. So right now I'm having weird artifact issues. My screen becomes fully artifact ridden while still being able to move the mouse around. Sometimes my cursor becomes a weird vertical line, however I can still interact with it. Does anyone have any ideas what's going on with this thing considering I just had it repaired?