I took it to the Apple Store at the Polaris Mall here in Columbus expected to have it shipped off to Apple to get a new logic board for $360 or so. I looked online and there was a bevy of information on the logic board graphics issues. The disk Utilities said the hard drive didn't have a problem, I ran the hardware test that comes on the CD that came with my computer back in 2011 and it said there were no problems, but it just kept happening more and more. I'd have to hard reboot numerous (up to 12 times) times to get it to work right. Granted it worked most of the time like normal but it would go into spurts of not working right for a day. The computer would get super hot on the bottom. I would get errors that popped up saying there was a graphics error. Sometimes there would be lines on the screen. The screen was locking up, the system would start to reboot and then lock up or continue to reboot over and over again. I have a 15" 2011 MacBook Pro, and about a month ago it started having all sorts of graphics problems.