As I was using my 15" MBP, it suddenly froze and then shut down. When I booted it back up, it booted to the regular start screen with the circular timer, but there were vertical lines of boxes running down the screen. After a while, the circular spinning timer stopped, and it just sat there. Whenever I shut it down and reboot it, the exact same thing happens. Here's a picture of what my screen looks like so you can see the lines (ignore the slight glare in the middle of the picture).
Please help!!!
http://tinypic.com/r/mcqd0o/7
Please help!!!
http://tinypic.com/r/mcqd0o/7