I have an iBook 700 and always keep the sound down. I don't think I've ever herd the startup chime before. Now, spontaneously, my iBook chimes during startup (yes, the volume is down). Not a big deal except I hate being one of the people who comes into a library and makes all kinds of computer noise. I zapped my pram but that did not seem to help. Just wanted to know if anyone had ideas about how I can keep my iBook silent.