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Powerbook cracking sound

Discussion in 'PowerPC Macs' started by persep, Sep 10, 2008.

  1. macrumors member

    I have a Powerbook 1.5GHz 15.2" with mac os x 10.5.4 and yesterday while cleaning the computer I noticed something weird. With computer unplugged from the power source, i turned it on and increased the volume when the desktop come on. Before I could hear the alert sound when you change the volume there was another sound, like 3 lower volume pops, the normal sound it makes when you change the volume.
    Then I turned off the computer plugged in all the cables and power source and turned on and then when I changed the volume I only hear the normal alert sound when changing the volume. It only happened when the computer was running on battery.
    Has this happened to any other user?

  2. macrumors member

    I've tried the same thing on my other laptop, an IBook G4 1.33GHz with Tiger 10.4.11 and it does the same thing. 3 popping noises when changing the volume the first when not connected to the power source.
    I wonder if it's some sort of warning sound because it's running on battery?

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