I have a late 2011 MacBook Pro with AppleCare+ that I purchased new in January 2012. Tonight, I went to boot up, and the screen went from solid white to blue, to red, and then several other screens, before getting to the main login screen. It has done this 4 times now. I plan on taking it in as soon as I have the chance, but was wondering if anyone had experienced this or knows what is the likely culprit. Edited to add: I just did the standard Apple hardware test, and it didn't find any problems.