Macbook buzzing sound?

I have a Macbook 3,1 with Leopard 10.5.5 and I just realized now that my Macbook has this buzzing sound near the top left of the keyboard.
Is this normal? I have searched a couple of forums explaining it is a common issue for Macbooks. Is there a fix for this? My fan is idling at 1800rpm taken from using smc fan control and istat pro.

Mine does that too.
I think it's normal, well I hope so :S

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    TwoPointOh
    I work on behalf of HP
    Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
    Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

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