I've read that 3 beeps means "no good memory banks." However, I can't find a definitive definition for this phrase - does it mean the RAM needs to be replaced or that the slots for the RAM in the MB are shot (requiring a new MB)? I'd give more information if I had it, but I'm troubleshooting someone else's computer from just a couple of remarks he made offhandedly. I know he's running Tiger and that he's not savvy enough to upgrade RAM on his own, so I'm pretty sure he's never been inside the machine. Thanks!