I have my MacBook hooked up to a pair of external speakers (M-Audio AV40, for those interested) and I can hear a slight click when the computer hasn't played any sounds for a certain amount time (about 30s to a minute). My PowerBook G4 never did this, so it's not the speakers.
It really gets annoying, is there any way to change this, other than turning the speakers down whenever I'm not using them?
It really gets annoying, is there any way to change this, other than turning the speakers down whenever I'm not using them?