Button makes electronic "click" sound when pressed
Here's a weird one -- I've got a 14" iBook G4 that makes a subtle electronic click sound when the button is pressed. It also makes this sound when the space to the LEFT of the button is pressed, like just pressing on the plastic of the topcase is triggering it as well. Very odd, I know. The sound almost sounds intentional, as if it's supposed to happen, and it's very subtle and high pitch, like two pieces of glass or metal lightly tapping. It's kind of pleasant, actually. It's definitely an electronic sound.
Anyway, I've had a few machines do this over the last couple years, and while it's not a huge horrible problem, it would be interesting to know what causes it. The machine has a fresh OS, so it's not a tweak to the button settings, etc.