I have a 2011 macbook pro, I know they have been prone to logic board issues and I already had to get the logic board replaced for erratic graphics behaviour a year ago, but now, a new issue has emerged and I am not sure if it is also logic board related. Sometimes when I switch or launch applications, the screen starts turning to a blue tinge. I downloaded this gfxcardstatus app that I found and discovered that anytime I switched to using discrete only, the 'AMD' graphics, it triggered the issue and my screen turns blue, but when I am in dynamic mode and switches back to intel, everything returns to normal. Is this a sign of another faulty logic board? Has anyone else had this happen?