i have an 09 unibody MBP; only change is 4GB of crucial RAM, which hasn't given me any problems on any of my other macs, etc. i haven't had a single problem with the machine until two days ago, when it freaked-the-fuck-out...the video went nuts, there was a loud repeating beep coming out of the speakers, and the computer went unresponsive. i had to pull the battery. i restarted, and it was back to normal. reset the PRAM, did a backup...no real problems. then i noticed that some video effects seem to go a little wonky. scrolling a file list (smooth scrolling) gets a little weird, and switching into spaces view shows just a bit of screwed up video. it's hard to describe. i'm thinking that the video card might be screwed up. how would you trouble shoot just the video card?