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Ticking fans

My wife's mac pro has a ticking fan. It's the one in the bottom rear. I'm pretty sure the machine is out of warranty by now.

While cleaning the dust out of the machine improves the noise, it doesn't cure it - the fan still ticks at about a 10 Hz or so rate.

Is this fan a user-replaceable part?

Mac OS X (10.5.1)

Posted on Mar 20, 2009 4:54 PM

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Posted on May 5, 2009 6:19 AM

Yes, the fan is user replaceable although it's not as easy as it should be. I just removed mine because it's not moving and my memory is overheating causing all kinds of problems. Even had the video card fail because of the heat rising from the memory.

After opening the side of the case you have to remove the memory card risers (The two pull-out circuit boards containing the memory. Now comes the first challenge. There are two long screws holding the memory cage to the motherboard and two short screws holding the cage to the bottom of the case. These last two screws are often held in by loctite and they are on metal posts. They are very difficult to remove and it's best to use think needle-nose pliers to hold the posts while you try to break the grip of the loctite.

After removing the four screws you now need to use a flat blade screwdriver to release the tabs of the fan from the memory housing. When you release the tabs (top and bottom)you can slide the fan toward the front of the case giving you enough room to remove the memory cage and the fan.

Not for the faint of heart. Good luck!
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Question marked as Best reply

May 5, 2009 6:19 AM in response to Nicholas Sayer

Yes, the fan is user replaceable although it's not as easy as it should be. I just removed mine because it's not moving and my memory is overheating causing all kinds of problems. Even had the video card fail because of the heat rising from the memory.

After opening the side of the case you have to remove the memory card risers (The two pull-out circuit boards containing the memory. Now comes the first challenge. There are two long screws holding the memory cage to the motherboard and two short screws holding the cage to the bottom of the case. These last two screws are often held in by loctite and they are on metal posts. They are very difficult to remove and it's best to use think needle-nose pliers to hold the posts while you try to break the grip of the loctite.

After removing the four screws you now need to use a flat blade screwdriver to release the tabs of the fan from the memory housing. When you release the tabs (top and bottom)you can slide the fan toward the front of the case giving you enough room to remove the memory cage and the fan.

Not for the faint of heart. Good luck!

Ticking fans

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