MacBook Pro left hand fan noisy

After turning on one of our 2009 MacBook Pro 17", after about 5 seconds, the left hand side fan would start making a buzzing noise. Thought it'd be something rattling around with it, or maybe catching a wire so I took it apart.

When I took the fan with the casing out I noticed nothing catching. It seemed to be rattling of its' own accord. I found this good post on how to fix the fan. Basically just take the two screws holding it together off. Then prize the fan off the motor.

Inside I found a little tiny bit of grit underneath the magnet on the main base. I tried to get it out but it proved pretty tricky. After 5 mins I got most of the bits out (very tiny bits), and I oiled the fan axle.

I put it back together and it worked a treat.

Thank you very much  ifixit.com and nofilmschool.com. This internet thing is very helpful.

27" iMac fans on full

After moving an iMac, i switched it on to find that its fans were blowing full blast, making quite a noise.

I tried:

• switching it off and back on
• restarting it
• reseting pram
• switching off, leaving it a while and switching back on again

none of these worked. I came across this article in apple knowledge base. reseting smc worked a charm.

Basically switch off, unplug for 15 secs, plug back in. Done