How to replace lower (CPU) fan in Rev. A iMac G5

Hi,

Can you post the spec's of the computer concerned please? There are some differences in the take apart procedures.

Cheers.

Ian.

Hey Rewes,
I can walk you through that. Email me.
Richard

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Rewes,
Basically you pry the metal bracket up (between the fan and the shroud w/ "G5" printed on it) It locks the fan in place. When you do that the top part of the fan tilts up. Then you disconnect the fan. From there you can wiggle the fan until it bumps into a tab on the front bezel and you have to lift and push in at the same time. You have to feed the cable through ...well ..It's a very tight fit. (I have pics)
Richard

Message was edited by: spudnuty

Hey Rewes,

Well, this it what I have tried but when I do it the fan doesn't seem to lift.

Yes I see what you mean. I have a 17" iMac G5 here now all taken apart. Logic board, HD and power supply out.
So the fan keeper only lifts straight up. You can't get the lower fan out because the speaker housing is in the way.
The power supply must be out but the logic board can stay as well as the HD.
You remove three screws at the top of the inner frame. They're between the outer white housing and the inner metal frame. There are also two long screws at the bottom lower left and right of the logic board. These have to be removed as well since then go thru to the front bezel.
Lift up the top of the inner frame and the entire inner frame will lift up. Don't remove it too far as the display cable and the airport cables are still attached.
With the inner frame up, you can reach under and remove two screws holding the speaker in (T-10). The speaker pulls out over the locking shaft for the back.
With the speaker out you can lift that fan lock up and the fan will slide straight out the bottom.
Whew!
I'm pretty sure that's all the screws but don't force it. If you have a problem post back. I have to step out for a bit and will check here when I get back.

Richard

Message was edited by: spudnuty

Oops there's another screw just below the left locator pin. So that's just left of the speaker and headphone ports.
R

Where did you buy the lower fan-Apple?

Ed. Bogh.

Hello Rewes,

I was going to post back here once I saw your spec's - Spudnuty has got you in very safe hands though. ( Cheers Richard )

Regards.

Ian.

Hey Rewes,

...to detach the old fan and see if there was something that I could do. It seems to be making a lot of noice

OK once you have the fan out you can gently pry apart the outer housing. It's just glued together. To glue back use Ambroid ProWeld from the hobby shop or any solvent type.
Gently remove the label from the back of the fan and underneath you'll see the bearing for the fan. Usually a drop of turbine oil, Lube-8 or Teflon flow? will fix the noise problem. If you remove the snap ring you can remove the fan completely if it's severely rusted.
Richard

spudnuty:

This bit of information about the fan is very helpful to me.

Ed,
Glad to be of help.
Richard