Results 1 to 8 of 8
  1. #1


    Member Since
    Mar 30, 2008
    Posts
    7
    iMac noise every 20min
    For some reason my iMac G4 (1.25GHz, 20-inch) makes a buzzing sound (approx.) every 20 minutes and 5 seconds. The noise is coming from its half-sphere base and lasts anywhere from 2 to 5 seconds. It seems to me that the source might be the internal HD, however I'm not 100% sure about that. The fact that the noise occurs in 20-min intervals makes me think that there is some sort of background operation going on.

    Has anyone had such experience? If not, then how could I figure out the actual source of the noise.

    Thank you.

  2. #2

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    22,114
    Specs:
    Imac 27" Retina 5K, 512GB flash memory, 3.3GHz, 16GB memory, macOS Sierra beta.
    Go to Disk Utility and see what S.M.A.R.T. verified has to say. If it says failing, time for a new HDD.

  3. #3


    Member Since
    Mar 30, 2008
    Posts
    7
    harryb2448, thank you for replying.

    I went to Disk Utility and the S.M.A.R.T. Status reads "Verified." Then I ran "Verify Disk" and according to the verification report pasted below the volume seems to be fine; I should mention here that I began the "Verify Disk" process right before the noise was due to come up; interestingly the noise did not come up as expected while the "Verify Disk" process was going on.

    Any other ideas?

    ------------------------------------------------------
    Verifying volume “untitled”
    Checking HFS Plus volume.
    Checking Extents Overflow file.
    Checking Catalog file.
    Checking multi-linked files.
    Checking Catalog hierarchy.
    %)
    Checking Extended Attributes file.
    Checking volume bitmap.
    Checking volume information.
    The volume untitled appears to be OK.
    Mounting Disk

    1 HFS volume checked
    Volume passed verification
    --------------------------------------------------------

  4. #4

    mac57's Avatar
    Member Since
    Apr 29, 2006
    Location
    St. Somewhere
    Posts
    4,560
    Specs:
    iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM
    I think it is the SMART testing. Depending on the loudness of the buzz you are describing, I wouldn't be worried. My G5 does the same thing, and has for the entire time I have had it. It is annoying from time to time, but at this point, I just tune it out.
    My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
    My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
    My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
    I was on the Mac-Forums honor roll for September 2007

  5. #5


    Member Since
    Mar 30, 2008
    Posts
    7
    mac57, I'm hoping you're right. What you're suggesting makes sense given that S.M.A.R.T. is supposed to be a HD's background self-checking operation which I'm assuming runs in time intervals. Thank you for replying.

    Now is there a way to get a S.M.A.R.T. status icon or something similar on my Menu Bar or my Desktop so I wouldn't have to open Disk Utility every time I need to check its status?

  6. #6

    mac57's Avatar
    Member Since
    Apr 29, 2006
    Location
    St. Somewhere
    Posts
    4,560
    Specs:
    iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM
    Quote Originally Posted by macnet View Post
    Now is there a way to get a S.M.A.R.T. status icon or something similar on my Menu Bar or my Desktop so I wouldn't have to open Disk Utility every time I need to check its status?
    I'm afraid that I am not aware of any way to do that. Anyone else?
    My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
    My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
    My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
    I was on the Mac-Forums honor roll for September 2007

  7. #7

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    22,114
    Specs:
    Imac 27" Retina 5K, 512GB flash memory, 3.3GHz, 16GB memory, macOS Sierra beta.
    just a thought macnet - do you have DiskWarrior installed by c hanve?

    There is an option to automatically run SMART verified with that program . Maybe there are others also?

  8. #8


    Member Since
    Jun 21, 2008
    Posts
    56
    go back to apple
     24" Aluminum iMac, 2.8GHz Intel Core 2 Duo
    2GB memory  13.3-inch: 2.4 GHZ white MacBook

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. iMac noise?
    By jppv in forum Switcher Hangout
    Replies: 1
    Last Post: 03-24-2012, 11:47 PM
  2. iMac Noise
    By polakbob in forum Apple Desktops
    Replies: 0
    Last Post: 11-12-2009, 09:06 AM
  3. Fan noise new iMac?
    By jennymac in forum Switcher Hangout
    Replies: 12
    Last Post: 07-18-2008, 05:03 AM
  4. New iMac w/crackling noise
    By Dice-K in forum Switcher Hangout
    Replies: 5
    Last Post: 04-25-2007, 01:46 PM
  5. G5 iMac 'noise'...
    By pod in forum Apple Desktops
    Replies: 2
    Last Post: 05-05-2005, 07:13 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •