After years of waiting, I finally got my first MacBook after a pleasant experience with my 1st gen iPod Touch last April. I didn't have any problems with it (as expected), but now there is something bothering me.
After my dad took it from my room while I was asleep and gave it back to me two days later, my Mac sometimes starts to suddenly increase fan speed to the point it becomes so loud it is scary. I get panicked everything it happens and force shut down because I swear the fan was going to fail. I suspected my dad did something, since the Mac was turned on downloading some stuff but the screen lid was off and it is so silent I thought my dad wouldn't notice it was on.
He said he turned it off and didn't do anything with it during those two days. I've searched a lot on the internet and only found complaints about excessively high fan noise in MacBooks when there are uncompleted printer jobs. I checked my System Preferences Printer tab, but there was nothing there.
Here on Brazil, Apple Store do not exist, and authorized tech support is far away from where I live (because there are not many of them). Apple won't accept e-mails since it is not an iTunes issue, and I won't dare to make a call to the USA. Before bothering my father with this, I would like your advice: what could it be? The noise is surely coming the fans, as the HD is only doing its standard read/write/head moving sounds. Not from the DVD drive either. My strongest guess is that *something* managed to get partially stuck on the fan, which could explain why the speed increase normally only starts when I slightly tilt the computer and why everything is normal while it stays above a perfectly straight surface (like a table).