Hello all, I have been having an issue with my graphics card in my MBP. First off, let me say that I have already searched through the forums using MRoogle, and couldn't quite find an issue that matched mine. Anyways, this issue has happened twice so far. Most recent occurrence was an hour ago. I was playing Portal 2 through Steam, and playing for roughly an hour or so. Mid-game, my screen got all blocky and what-not, and I couldn't see my character, or any of the map. After a few seconds, my MBP made a loud beeping noise, the sleep indicator light came on, and the computer froze. I had to do a hard shut off and reboot, and everything has been fine since. I haven't tried to play the game again yet. The first time this happened was a few months ago when I was playing angry birds using Google Chrome. The problem was the exact same as described above. Pixelated and blocky as all get out, sleep indicator light comes on, computer freezes, forced to do a hard boot. The issue is definitely graphics related in my opinion. I'm wondering if it's due to the chip getting too hot? Both times the issue has happened the computer has just been sitting on my lap. When I game with a fan underneath the machine, I haven't had an issue. I apologize for the lengthy post, but I figured more detail is better than less detail. Thanks for all of your suggestions and opinions!