New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus • Advice and insight from world-class Apple enthusiasts • Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

27" iMac Hum Resolved


Post Reply New Thread Subscribe

 
Thread Tools
VegasGeorge

 
VegasGeorge's Avatar
 
Member Since: Sep 23, 2006
Location: Las Vegas, NV USA
Posts: 893
VegasGeorge is a jewel in the roughVegasGeorge is a jewel in the rough
Mac Specs: iMac, and Macbook Pro

VegasGeorge is offline
My wife's new 27" iMac was producing a noticeable and annoying low frequency humming sound. At first I thought it was coming from the screen, so I shut that down. The hum persisted. Then I put the iMac to sleep. The hum went away. It came back as soon as the iMac woke up. I had visions of hauling it down to the store for a genius bar appointment, etc. Then I turned the iMac around and put my ear to the back of the case to try to isolate the area where the hum was originating. Imagine my surprise when I didn't hear any hum at all. At first I was confused by that. Then I gently picked up the iMac, lifting it off the counter top on which it was sitting. The hum immediately ceased. The hum came back as soon as I set the iMac back down. So it wasn't an electrical hum at all, it was a hum produced mechanically by vibration propagating from the iMac to the glass counter top. The glass was humming. I put fairly heavy felt pads on the bottom of the iMac stand, and the hum is virtually gone. It's no problem any more. And, I'm sure that a more sophisticated vibration dampening solution would eliminate the hum altogether. Just wanted to share the information.
QUOTE Thanks
MYmacROX

 
MYmacROX's Avatar
 
Member Since: Mar 17, 2009
Posts: 3,599
MYmacROX is a name known to allMYmacROX is a name known to allMYmacROX is a name known to allMYmacROX is a name known to allMYmacROX is a name known to allMYmacROX is a name known to allMYmacROX is a name known to all
Mac Specs: 2008 15" MBP ML, 2012 21.5" iMac ML

MYmacROX is offline
Very interesting.
Does it matter what apps you're running or does it do it with no apps at all going on?

16GB iPhone 5, 64GB Wi-Fi only iPad 1st Gen.

Reminder: Please include your Mac's specs. This will make it much easier for the other members to assist you.
QUOTE Thanks
VegasGeorge

 
VegasGeorge's Avatar
 
Member Since: Sep 23, 2006
Location: Las Vegas, NV USA
Posts: 893
VegasGeorge is a jewel in the roughVegasGeorge is a jewel in the rough
Mac Specs: iMac, and Macbook Pro

VegasGeorge is offline
No apps, just Finder running.
QUOTE Thanks
Frankieboy

 
Member Since: Apr 22, 2011
Posts: 1
Frankieboy is on a distinguished road

Frankieboy is offline
Brilliant! Had my new iMac for just over a week when I noticed this low-pitched annoying hum. Didn't remember it being there when I first booted up. Anyway, checked lots of threads here and was on the verge of reluctantly returning my machine when I came across your post. Tried lifting the machine as you describe and it went! I have a hard floor and desktop and the sound was entirely caused by reflected vibration. Have just put some felt feet under the base and it's now virtually silent. I see Amazon also sell cheap 'vibration-free feet' for exactly this purpose. Thanks for posting your solution, you certainly saved me considerable time and trouble.
QUOTE Thanks
davidcrickett

 
Member Since: Oct 21, 2011
Posts: 1
davidcrickett is on a distinguished road

davidcrickett is offline
Thank you, thank you, thank you! I lifted my iMac 27 from the table, and the humming disappeared!
QUOTE Thanks
donlon

 
Member Since: Aug 26, 2011
Posts: 11
donlon is on a distinguished road

donlon is offline
I just fittet some sound isolating felt from an old PC to the bottom of my iMac stand, and it removed 80-90 % of the humming :-)

Thanks for you great tip :-)
QUOTE Thanks
rjcarte

 
Member Since: Nov 16, 2011
Posts: 1
rjcarte is on a distinguished road

rjcarte is offline
Oh what a relief!! This worked a treat...

I had this exact problem... annoying low pitch humming noise...

I've put my iMac on a marble chopping board (!) and its worked a treat. No sound at all now!

:-D
QUOTE Thanks
rafem

 
rafem's Avatar
 
Member Since: Sep 13, 2009
Location: Miami, FL
Posts: 8
rafem is on a distinguished road
Mac Specs: iMac 27 in 2.7Ghz i5 Quad

rafem is offline
I want to thank you!! Looking for an answer to another issue I came across your solution and bingo! My hum gone!!

rafeman, the lightchaser
QUOTE Thanks
SLOimac

 
Member Since: Jan 31, 2012
Posts: 6
SLOimac is on a distinguished road

SLOimac is offline
Hello,

I would just like to confirm I have exactly the same humming low pitch very anoying noise in my 27" iMAC. I5, 12GB RAM, 1TB HD.

I fat book and rubber vibration absorbers under iMAC stand helped a bit but that's not really a solution. I wan't a silent computer. With Apple and 21 cent. I though I might finnaly get lucky. NOT!

Now it's reading laws, returning to store, talking to service people,...
QUOTE Thanks

Post Reply New Thread Subscribe


« Opening and closing applications and documents | 2.7GHz or 3.1GHz CPU? »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
Bootcamp Win7 64bit and iMac 27" 2010 ovbg Running Windows (or anything else) on your Mac 4 12-09-2010 02:00 PM
Want 27" iMac to serve as dual display to Lenovo 410 mattshake Apple Desktops 1 10-03-2010 09:47 PM
27" Imac for Dreamweaver, Fireworks and Flash? chonalicious Apple Desktops 0 02-27-2010 12:03 AM
iMAC 27" microprocessors??? Gabrielc Apple Desktops 2 02-20-2010 08:47 AM
The New iMac (merged) EDIT-XTREEM Apple Desktops 7 07-21-2006 04:29 PM

All times are GMT -4. The time now is 10:08 PM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?