Hello, everyone. I'm having a terrible issue with my MacBook Pro 2.2GHz Santa Rosa Core 2 Duo A1226 (not unibody). All of a sudden, the screen began flashing violently, terribly violently. And as soon as it happened, the entire computer froze up. After forcing it to shut down and powering back up, it cannot boot past the gray restart screen. Does anybody have an idea what may have caused this issue and/or how I can fix it? It's past warranty so I doubt the Apple Store can help, but I'm going to go there anyway. As a hobbyist computer technician who repairs/upgrades/etc. Apple computers all the time, this is an extremely unique occurrence that has got me scared out of my whits. Please help. Thank you!