MBP (older model) making funny noises near fan duct

Discussion in 'MacBook Pro' started by potlatch, Feb 9, 2009.

  1. potlatch macrumors member

    Dec 5, 2006
    My MBP is making funny noises when I turn it on. It's been happening a month or two now.

    I've assumed it's dust in a fan which gets dislodged after time. As it becomes more regular, it seems vaguely connected with temperature. After the MBP has been on a while, the noise goes.

    This evening, I noticed that it's directly related to the brightness of the screen; if the screen is off or very low, the sound is less bad; towards middle-brightness, the noise is worse; and at full brightness it's completely absent.

    Does anyone know what's causing this? Should I worry about it, or is there anything I can do?
  2. tobyg macrumors 6502a

    Aug 31, 2004
    Sounds like it might be the inverter in the display.

    Still have some applecare left? If so, take it in.
  3. DjStiky macrumors member

    Apr 19, 2007
    I have the same problem with my 15" Macbook Pro

    Got an appointment with a Genius at the store, they ordered me a new screen.
  4. potlatch thread starter macrumors member

    Dec 5, 2006
    I'm well past the warranty and no Applecare. The machine's a few years old.

    Is there anything else it could be? Dust/fluff, or anything that doesn't require an unemployed person shelling out loads of cash for something to be fixed.

    How much does this screen replacement cost anyway?

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