[Ti] Noisy Fan Again

[Simon Royal]

Marcus

Thanks for the reply.

I have a take apart guide, both online and in my head. I have stripped  
this machine more times than I care to remember.

Not only am I concerned about the noise. It is very irritating when  
you are trying to surf and watch TV at the same time. I am also now  
concerned about the left fan not coming on.

Does anyone know when it is supposed to come on. Do the fans work  
independantly. I have noticed the right and the middle fan come on at  
different times. It seems the middle comes on after the right one, to  
give it a boost maybe. So I am assuming that the left and right should  
come on together.

Simon

On 29 Sep 2009, at 17:23, Marcus Benjamin wrote:

> It sounds to me like you have a fan with a bad bearing/bushing.
> You can't take the panel off & have it get as hot as it normally  
> gets unless you introduce some heat to it.
> But then the heat is from a different area than normal & it isn't  
> replicating your exact problem.
>
> On 7:33 AM~9/29/09, at 7:33 AM, Simon Royal wrote:
>
>> Hi.
>>
>> For the last few months I have been having some trouble with a  
>> noise fan on my TiBook. At first I thought it was the one on the  
>> right hand side (under the power button), but after closer  
>> inspection today it sounded like the middle one. There are three on  
>> this model, one under ear speaker grill and one directly in the  
>> middle at the back.
>>
>> I took the bottom casing off a few weeks ago, blew out as much dust  
>> and rubbish as I could and it seemed to have solved it. However,  
>> the last few days the noise is back and worse than ever. It is a  
>> horrible dry grinding noise, but I still can't 100% tell where it  
>> is coming from.
>>
>> Today I took the bottom off again, this time with the machine  
>> running, stood it on one end and then ran a number of heavy apps -  
>> iTunes, OpenOffice, Scribus, GIMP, Sequel 2 and MacTracker - at the  
>> same time to try and stress it out enough to get the fans on. Only  
>> the middle one came on and it was pretty quiet, just a normal fan  
>> noise. The other two didn't come on.
>>
>> I put it all back together and within minutes the noise was back  
>> again - and is still doing it now. Listening carefully it sounds  
>> like it is the right hand side fan. I cannot feel any air coming  
>> out of the left or the back vent, but when I put my hand over the  
>> right vent the fan seems like it gets faster and the noise worsens.
> Can you cut little strips of paper & put them in the vent holes to  
> see if they rattle & therefore are spinning?
> Just a quick dumb thought, or maybe a twist-tie from your grocery  
> store bread loaf?
>>
>> I have checked and there is nothing stuck in it and no wires over  
>> it/near it.
>>
>> 1. Is it dangerous, as in will it stop working?
> It can be problematic if your Mac gets too hot too often.
>> 2. Is it a known/common problem with the TiBooks?
>> 3. Should replace it?
>> 4. I cannot remember ever feeling the left hand side fan come on  
>> (no air coming out), would this put additional stress on the other  
>> two fans?
>> 5. Can anyone with a Ti tell me if their left hand side fan comes on?
>> 6. Can I spray it with WD40 or anything similar?
> NEVER spray WD-40 on a fan assembly especially in small electronics.
> WD-40 is a Water Deterrent
>> 7. Is it the fan or is it just a noise vibration through some of  
>> the casing?
> It sounds to me like the fan bushings/bearings are shot, I've had  
> that a lot.
>> 8. What would be needed for all the fans to come on?
> Email me back to remind me, I should have a take-apart guide for you.
>
> Good Luck,
>
> Marcus
>
>>
>> I know I have probably asked this before, but I never got to the  
>> bottom of it. This TiBook is my only Mac and I do not want it to die.
>>
>> Simon Royal
>> ---
>> Site: http://www.simonroyal.co.uk. Twitter: http://twitter.com/SimonRoyal 
>> . Skype: Simon-Royal. (PowerBook G4 867Mhz, 1GB RAM, 80GB HD,  
>> SuperDrive, Mac OSX 10.5)
>>
>>
>>
>>
>>
>>
>>
>>
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Simon Royal
---
Site: http://www.simonroyal.co.uk. Twitter: http://twitter.com/SimonRoyal 
. Skype: Simon-Royal. (PowerBook G4 867Mhz, 1GB RAM, 80GB HD,  
SuperDrive, Mac OSX 10.5)