Dreaded fan noise is BACK!

I can't believe my ears, but the same fan noise from my 20" G4 iMac is now BACK in my iMac 20" CoreDuo!! It took much longer to rear it's ugly head, but I can clearly hear the "fan wobble" coming from the iMac. This time, it's louder as well. MUCH louder. It can be heard over music or with most low background noise.
Has anyone else experienced this wobble noise? This is terribly annoying.

If your signature information is up-to-date then your new Mac is not. Have you installed the Firmware 1.0.1 update? The SMC Firmware update? The OS X 10.4.6 update? As well as the various updates to the installed software that came with your Mac? These address various issues that have cropped up in the 1st six months of Mac Core Duos.
They are located here.
Apple Downloads
Before anything else it would probably be best to manually download the two firmware updates and install one at a time. The SMC Firmware update requires OS X 10.4.6 be installed first. Please follow the instructions carefully and exactly.
The SMC Firmware update specifically was issued to address power issues, such as the fans.
Software Update in the Apple menu can handle the software updates just fine.
Follow these ideas for maintaining your Mac and for things to do with software updates
Maintaining Mac OS X
I promise you that maintaining your Mac properly will give you many happy years with it running in tip top condition. Keeping your signature up-to-date helps folks assist you better.

Similar Messages

  • MacTel iMac and the dreaded fan noise...

    a buddy of mine bought an iMac G5 2 Ghz last June and mentioned having no problem with the dreaded fan noises of said iMac. fast forward to last week when we got together to do some nerdy stuff in front of same iMac when he casually mentions to me. "my fans have been going crazy lately" ... not that his iMac sounds like a jet turbine or anything, but it got me thinking about the new "Intel Inside" Macs. and with two cores inside, goodness!
    so b4 i rush out and buy one of these babies -- i'm going to wait and see regarding the fans. but it will be interesting to see how all of this plays out.
    CMM.
    PS.. i am a bit amazed (and elated!) that the Intel Inside Macs have already become a reality -- 6 months sooner than expected. (who would have thought!)
    YAY!

    Miriam,
    Maybe I was a little premature. I just went to abc.com to watch the last episode of Men in Trees and here's the results.
    With ABC video running (maybe quarter screen size), the CPU was running at a steady 65-70%, CPU temp 69.8, CPU fan 4791-4814 steady (very loud).
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    Oh well...don't really consider this very good performance. The fan went down to the 2700 range on reduced, but then the video was choppy. Good thing my capacitors are leaking...Maybe I'll get a Core 2 under my 3 year Apple Care.

  • Intermittent shutdown, fan noise

    I have an iMac G5 ALS, 17", 1.8ghz that I bought new from Apple in August '05.
    The serial # starts with W853.
    It has always had an over active fan IMHO, but I've read of this complaint often on these forums, so I never paid it much mind. In June '07 the iMac started intermittently shutting itself down so I brought it in. I had Apple Care thankfully so they swapped out quite a few parts, including some sensors, the Logic Board, and PSU.
    I brought the iMac home, and within a day or too the hyper-active fan noise was back. However, the iMac was not shutting itself down randomly anymore... until today.
    The system log shows me, "AppleSMU -- shutdown cause = -110"
    It happened once, I haven't been able to reproduce it yet, but it of course has me worried.
    I have central air in the house, the room never gets above 75 degrees.
    The CPU at rest/casual computing is around 65 degrees with the fan whirring away at 5600rpm.
    Hard Drive at 44 degrees, fan at 3206rpm.
    WDC 49 degrees, fan at 2500rpm.
    What is the real story with the iMac G5? Are there things I can actually do to keep this machine running while avoiding intermittent shutdowns, and reigning in this fan noise?
    Thank you in advance for taking the time to share your experiences and advice.

    I'm having a similar problem with the sudden shutdowns but not with the fan noise. This just started today after being out for a few hours I noticed that the computer was shut down instead of asleep. I booted it up and it shut down within a few minutes. This continued for several attempts and now I can't even get passed the startup sequence before it shuts down. I can't run any tests on it 'cause it will shut down in the process if not before. I am still under the extended warranty so I guess I will be taking mine in as well. What could be the cause of this? Does anyone have any other suggestions?

  • Fan Noise back again with 3.1.6-1-ARCH

    Hi,
    I opened this ticket (before) https://bbs.archlinux.org/viewtopic.php?id=132077 to solve this issue, and now with the new kernel the temperature is back again
    coretemp-isa-0000
    Adapter: ISA adapter
    Physical id 0: +52.0°C (high = +86.0°C, crit = +100.0°C)
    Core 0: +51.0°C (high = +86.0°C, crit = +100.0°C)
    Core 1: +52.0°C (high = +86.0°C, crit = +100.0°C)
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    ERR: nothing changes with the fallback ,was a wrong impression
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    Last edited by r0b0t (2012-01-01 20:57:34)

    I never checked it with htop buthere we have some info (I try keeping it minimalistic)
    1) ps -ely
    http://pastie.org/3922312
    2) ps axjf
    http://pastie.org/3922320
    3) ps axms (threads information)
    http://pastie.org/3922330
    htop screens:
    http://i.imgur.com/oVRvP.jpg
    http://i.imgur.com/gwqEh.jpg
    So currently as "big" program I'm using only firefox (with only 1 tab opened)
    Adapter: ISA adapter
    Physical id 0:  +57.0°C  (high = +86.0°C, crit = +100.0°C)
    Core 0:         +53.0°C  (high = +86.0°C, crit = +100.0°C)
    Core 1:         +57.0°C  (high = +86.0°C, crit = +100.0°C)
    Last edited by r0b0t (2012-05-16 21:16:45)

  • 2 years of this fan noise....check my temperature?

    so i've been battling the dreaded imac g5 (first gen) fan noise for the entire 2 years I've had the computer now. one midplane (out of 3 now? 4?) almost fixed the problem, but it had other problems. For the past year I have just let it go as it was in a room with a noisy window air conditioner and a noisy PC. Now I've moved and am back in a quiet room and the noise is unbearable.
    Took it back to the apple store but they said it wasn't noisy (and it seemed less noisy there, not near as much "whine", but that could have just been all the ambient noise as well - music, crowded store, etc)
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    Hi Eric, you might get more help posting in the G5 forum. This forum is for the iMac Intel Core Duo.

  • Fixing Fan Noise Created Keychain and Connectivity Problem

    This will kind of be long so bare with me...
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    So my questions are:
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    2. Why did booting up with a different startup disk seemingly corrected the problem?
    3. In the Keychain, is there a way to apply "Always Allow" as a group instead of one by one?
    4. Is this an unforeseen side effect of updating to OS 10.5.6?
    5. Could any of this have been avoided?
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    Message was edited by: Carlton Chin
    Message was edited by: Carlton Chin

    FYI to all the helpful folks here (and any looking to shut their jet engine off as well): Flashing the BIOS did the trick.
    First I had to find a website with DOS OS files and put those on the USB instead of Vista.  Oldie but a goodie, but at least it booted! No other versions would.
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  • Big fan noise problem: the rear fan won't shut off, the BIOS won't update, systemupdate locks up

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    So after the replacement, the rear fan will not shut off. Jet engine noise all day. I went into the system settings and selected "Quiet" for the Fan settings but that did not help.
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    systemupdate le
    http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-69701
    eternal reboot
    BIOSD attempt:" 2xjy26usa
    http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-69701
    error 1275 no admin priv - I AM the administrator account, there is no other acct to use!
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    This does seem to duplicate other forum messages but I can't get anywhere on this.  Help!
    Solved!
    Go to Solution.

    FYI to all the helpful folks here (and any looking to shut their jet engine off as well): Flashing the BIOS did the trick.
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    Thanks to all for the hints - I believe I had gotten the idea of flashing the BIOS to solve this from some other thread I found here.  This is a very nice forum to have bookmarked.  

  • Macbook pro- OSX lion 10.7.2 fan noise

    I just bought a macbook pro laptop, upgraded it to the Lion version, it is now 10.7.2, with processor of 2.7 GHz intel core i7, memory of 8GB, 1333 MHz DDR3. Whenever I am on a program like imovie, safari, iphoto, charging my smartpen...etc.... the fans goes off like crazy. It lasts for a very long time. Sometimes the noise get so bad, it goes from loud to louder...... I don't know what the problem is.
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    Thanks a lot for replying, but what exactly does the istat widget program do?
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  • Vaio E series - Cooling Fan noise

    Hello, 2 weeks ago I bought Vaio E series.  I was very excited that I will have Vaio laptop. It was like my dream wish. According to our standard, we are poor country and the Vaio laptops are extremely expensive. But, Vaio laptops are know for high quallity laptops and great support from Sony. So, I bought it. I am very satisfied with the quality. But I have one problem. The cooling fan is making a lot of noise even the CPU usage its 10 %. I have the latest BIOS version. So, Sony I am expecting from you to release a new BIOS update fixing this issue.. I dont want to start thinking that I pay a lot of money only for the name. With that money I could buy a more powerful machine but I put my trust in Sony. The model number is Model # SVE17122CXB. PS. Don't say that I should go to service center because they can do nothing. I am an IT student and I know how this stuff works. And I dont  want the fact that the new laptop will be repaired. So the only solution is BIOS update. Sony, do not make me regret that I have chosen you before other brands. 
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    t0n1,
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  • TA25225 Display Flickers in my 21" Imac Intel. This happened after the fan noise in my machine. I also reported the problem and gave to the service centre, but the problem still persist. Please help. I purchased it 3 - 4 weeks ago

    Hello,
    I purchased my imac intel 21" 3-4 weeks ago and in the 2nd week i faced an issue with the machine. When i switched on in, there was a fan noise and a white screen. The machine had hanged. I reported the problem and gave to the service centre. After testing for a week, they said that there is no problem with the imac. Again i faced the same problem after receiving it from the service centre. They again tested the machine for 3-4 days and reported as no problem with the machine. Couple of days back, I received the machine from the service centre, and on the same day when i switched it on, there are flickers in the display. Please help me solve the issue. I am from India. The service here is very bad.
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    Hello RedDevil07
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  • Mac Pro will not boot, constant loud fan noise and nothing else

    hello,
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    Hi, here are the steps I would go through. I would unplug the Mac Pro completely from everything and look at the video card's fan intake to make sure it isn't plugged and just make sure everything "looks" correct. I would then plug the machine back into one monitor/keyboard/mouse (leave all the other peripherals disconnected. Once that is done push the power button. Does anything happen? If not then if you have another mac and an external hard drive, make a copy of the OS on the drive and see if you can get the Mac Pro to boot off that drive. If the video card doesn't work then it will not show anything when booting off an external drive. If the external boot does work then I would suspect that you have a bad hard drive (or it crashed). At that point I hope you have a back up of all your data and such.
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    Message was edited by: jlseattle74

  • Why do I have fan noise after OS 10.7.5 update?

    I used to have moaning sounds coming from my Mac Pro (Quad Core, early 2008) when I was in motion graphics programs, or in NetFlix. But ever since I updated to OS 10.7.5 3 days ago, the fan moaning is incessant. Help! I just spent $200 on an old geezer "official Mac" technician, who came to my home office and spent 2 hours doing DiskWarrior!
    I am so busy right now, I can't stop to take the tower to a local authorized shop. Will the noise sink my CPU? What is causing it? Is it a glitch in OS 10.7.5? Or do I need new fan(s)?
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    I used the following:
    Copy and past the following in terminal followed by your password when asked for:
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  • Clicking noise from back left of MBP -- speaker maybe?

    Hi all,
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    I saw the long thread about a 'pop' noise here:
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    I looked at some MBP take apart guides and see that the hard drive is in the front left, but my click seems to be coming from the back left (if I put my ear on the front left I can hear the hard drive spinning and all, but the click doesn't seem to come from it). I tried the hdapm suggestion in that thread just for kicks, but nothing happened, so overall I don't think it's the hard drive.
    The only moving part in the back left as far as I can tell is the left fan, but I checked the fan speed with smcFanControl, and they were both at 2k (normal speeds). Plus, it doesn't sound like something I would expect a fan to make, but I could be wrong. The click happens in bursts usually, clicking about once every 5 seconds (it seems pretty consistent) for a while, but then has long periods without clicking. It doesn't seem to click more or less depending on computer usage. I would think that if it were a fan noise, it would click a lot more often (every 1/2000 seconds! ;>), and I don't see why it would come in and out in?
    I'm wondering if it might be a periodic pop from the speaker. It happens when the volume is down & muted, though, so that seems somewhat odd. If it is the speaker, I don't think it has anything to do with interference, as it will make the noise when the computer is on battery power, with nothing plugged in, far from any electronics.
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    Welcome to Apple Discussions!
    I didn't read all of that long thread, but I have heard of the type of noise you describe being associated with the hard drive. Whether it's benign or ominous or something else entirely is hard to say. But there are a couple of little utilities that can help you evaluate your hard drive:
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    http://www.corecode.at/smartreporter/
    S.M.A.R.T. Utility:
    http://www.versiontracker.com/dyn/moreinfo/macosx/32454
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    My Fujitsu drive is absolutely silent, and that is what you should expect. My external La Cie makes clicking noises every so often, and always has, so I think that is normal for it.
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    Do you have the widget iStatPro? It might be better for monitoring the fan speed without using smc fan control. But if the left fan is at 2000 RPM, then I would expect a very rapid click, which does not sound like it's the case here.
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    Good luck!

  • Constant fan noise on macbook pro

    Hello, my macbook pro (mid 2010 model, 13 inch, 2.4 ghz intel core duo 2 running Mountain lion) is experiencing constant fan activity at very high speed. The CPU however is only used at 9% of its capabilities top. The problem occured after a freeze in adobe Lightroom, since then, the fan noise start as soon as the computer starts (except if i press some keys before i turn it on for some reason, the noise would come back if i shut down the computer and restart it, or simply close it). I'm dully aware that it is normal that the fan is constantly working, but not usually at such high speed (top speed of the system), I checked all the major solutions offered on the net so far with no success (reset SMC, reset Pram, checked if i had some printer activity on the waiting list, checked the activity monitor for any particular demanding activity or tasks and finally i tried to run an apple harware test to see if some temperature probes are broken on the motherboard, however my computer for some reason is not taken care of...).
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  • My 2008 Macbook Pro makes a loud fan noise.

    Hello -
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    Some of the applications that you mention are somewhat CPU intensive which creates heat and results in fan speed increase and hence additional noise (to state the obvious).  However if you are experiencing excessive noise when CPU loads are modest it could be that your fans are failing as all mechanical devices eventually will or you may have 'schmutz' inside that is the cause of the unwanted noise.
    I suggest you open the MBP and see if there is any dust in the fans that may very well be affecting their performance.  After 4 years, this is not an uncommon situation and it could be the solution to the problem.
    If not, then you may consider getting replacements from iFixit or Powerbook Medic and replace them your self.  It is not rocket science in this instance.  If you suffer from chronic fingerfumbilitis, then have the Apple store do it for you.
    Ciao.

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