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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

MacBook Pro - Why does the fan start up when I open up my macbook pro 13"?

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Member Since: Jul 30, 2009
Posts: 45
jayt is an unknown at this point

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Everytime I open up my macbook, the fan starts to kick in reaching up to roughly 2700 rpm according to istat? Initially, the fan will kick in but the rpm's will eventually hover back to the normal 2000rpm range. I should also note that this only happens when i'm not connected to a power source. That is, when I open up my macbook without a power source, the fan will kick in as apposed to opening it up while connected to a power source, the fan will not kick in. I was just wondering why that is. Thanks!
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Member Since: Jun 23, 2009
Posts: 70
sachadon is an unknown at this point
Mac Specs: Mac Specs: Mid 2009 13" MacBookPro 2.26 GHz, 5 Gb, 500 GB, OS X 10.6.5

sachadon is offline
I observed the same thing. Is this normal? (I hope somebody answer this since this post has been sitting there for a month without any answer)
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