[X4U] Noisy iMac fan

[teddi at alohabroadband.com]

I have the same problem on an Intel Mac Pro; mine only occurs if I  
allow the machine to go to sleep. On wake-up the fan roars for a  
minute and a half to two minutes, sometimes longer ... it is  
unbelievably loud. The first time it happened I thought it was a water  
tanker truck having trouble on the steep hill below my house!

The problem started with a firmware update earlier this year and has  
never been resolved; resetting the PRAM had no effect at all.  
Subsequent firmware and system updates have not cured it. I have  
temperature monitoring software, and all internal temps are well  
within tolerances; there is no need for the fan to run at 50x its  
normal speed, it just does.

My solution at this point has been to simply never allow the machine  
to sleep. The company has been totally unresponsive even though there  
are hundreds of reports of this issue, if you search online; I've been  
a Mac user since 1986 and I've never been so disappointed in Apple.

Teddi Stransky

===============================

Quoting wilkinw <macsys at mac.com>:

> As a quick try she could reset the pram.
> Restart hold down the command option p and r keys. Some suggested that
> you actually do this 2 or 3 times in a row.
> Not sure on the particular models but has she tried any software
> updates. In the past I think there were some that actually addressed
> this. Also have her do a repair permissions.
> FYI, if there is a software update the one that would fix this is
> what's called a firmware update. It's a little involved for a novice
> user. It usually involves launching the download and doing a shutdown.
> Then when powering up you need to hold down the power button until a
> long tone is heard then the update runs.
>
>
> On Nov 27, 2007, at 3:36 PM, Mark Des Cotes wrote:
>
>> Hi all,
>>
>> An elderly woman I help out from time to time just asked me where   
>> she could send her G5 iMac for repair. When I asked what the   
>> problem was she told me the fan on her iMac would rev up so fast   
>> that she thought the computer would take off. After a minute or so   
>> the computer would freeze and and she'd be forced to restart it. I   
>> told her to hold off sending it anywhere until after I checked with  
>>  this list. Correct me if I'm wrong, but I seem to remember   
>> discussions regarding noisy fans and the fact that the problem was   
>> software, and not hardware related. Am I correct in my   
>> recollection? Was there ever a solution discovered? I can't   
>> remember if she's running Panther or Tiger. I'm going there on   
>> Thursday and would like to see if I can fix the problem for her.
>>
>> Mark Des Cotes
>> Owner-Graphic Designer
>> Marksman Design
>>
>> Mailing adress:
>> 7-841 Sydney Street, Suite # 338
>> Cornwall, Ontario  K6H 7L2
>> Canada
>> 613-936-6876
>>
>>
>>
>>
>>
>> Mark Des Cotes
>> Owner-Graphic Designer
>> Marksman Design
>>
>> Mailing adress:
>> 7-841 Sydney Street, Suite # 338
>> Cornwall, Ontario  K6H 7L2
>> Canada
>> 613-936-6876
>>
>>
>>
>>
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