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

iMac 27" suddenly making high frequency noise when LED is set to high brightness?


Post Reply New Thread Subscribe

 
Thread Tools
welshred

 
welshred's Avatar
 
Member Since: May 09, 2011
Posts: 53
welshred is on a distinguished road
Mac Specs: 2013 iMac 27" Intel i5 Processor, 16Gb RAM, 10TB HD (9TB External) , 2 x iPhone 5, 2 x iPad Retina

welshred is offline
Hi,

Ok, yesterday I started to hear my iMac making a high pitched noise (coming from top left corner) which is more prominent if you stand behind the mac and worse still if you stick your ear above the iMac where the vents are.

This noise only started yesterday and the only way to stop it is to turn the brightness down, so it is clearly related to the LED screen.

I have looked into this already and on another forum they talk about it being an issue with the coils on the LED board.

My question is does/has anyone ever come across this and is it something apple should repair without cost even if outside of warranty as there is no way a fault like this is acceptable after just 18 months.

Also does anyone know if this can be repaired and how much it would cost me if I did have to pay.
QUOTE Thanks
Thymen

 
Member Since: Mar 18, 2012
Location: the Netherlands
Posts: 85
Thymen is on a distinguished road
Mac Specs: iMac 27" i5 3.1GHz / 1TB HDD / 16GB RAM / Model 12.2 / Mavericks 10.9

Thymen is offline
Exactly same here, got progressively worse over time. Ended up having the main power board replaced. Makes sense, if you consider that power consumed is related to screen brightness.

I have AppleCare, so replacement did not cost me anything, but I assume it is not cheap if you have to pay for it yourself...

Thymen
QUOTE Thanks
welshred

 
welshred's Avatar
 
Member Since: May 09, 2011
Posts: 53
welshred is on a distinguished road
Mac Specs: 2013 iMac 27" Intel i5 Processor, 16Gb RAM, 10TB HD (9TB External) , 2 x iPhone 5, 2 x iPad Retina

welshred is offline
I guess it could well be power supply related.

Don't suppose anyone knows how much a replacement power supply unit costs and if it's easy enough to do yourself?

Same for an LED board, how much does a board cost. I am capable of installing it myself.

The noise is not only apparent when the brightness is up but when I am woking it goes up and down depending on screen activity (changing webpages etc).
QUOTE Thanks
Thymen

 
Member Since: Mar 18, 2012
Location: the Netherlands
Posts: 85
Thymen is on a distinguished road
Mac Specs: iMac 27" i5 3.1GHz / 1TB HDD / 16GB RAM / Model 12.2 / Mavericks 10.9

Thymen is offline
Quote:
Originally Posted by welshred View Post
The noise is not only apparent when the brightness is up but when I am woking it goes up and down depending on screen activity (changing webpages etc).
Exactly my experience, so my bet is on the power board...

Thymen
QUOTE Thanks
chscag

 
chscag's Avatar
 
Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 40,956
chscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond repute
Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, Yosemite

chscag is offline
Unless you're technically able and have the right tools, you might want to have the work done by Apple. An iMac is a difficult machine to do any work on. The entire front display must be removed before being able to gain access into the machine. You can get some idea of what's involved by going to the ifixit web site and look up the instructions for changing the hard drive in your iMac. It pretty much involves the same steps and procedures.

iFixit: The free repair manual
QUOTE Thanks
welshred

 
welshred's Avatar
 
Member Since: May 09, 2011
Posts: 53
welshred is on a distinguished road
Mac Specs: 2013 iMac 27" Intel i5 Processor, 16Gb RAM, 10TB HD (9TB External) , 2 x iPhone 5, 2 x iPad Retina

welshred is offline
Thanks for the advice, it's because of ifixit that I am willing to do it myself as I had already seen how to do it through there youtube channel.

What I don't know is how much the part(s) will cost.
QUOTE Thanks
chscag

 
chscag's Avatar
 
Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 40,956
chscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond repute
Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, Yosemite

chscag is offline
Quote:
What I don't know is how much the part(s) will cost.
The ifixit site may have the parts, check with them first. If not, try Powerbookmedic. Mac Repair - Mac Parts and Service for Apple Macbook, iPhone, iPad

Also try Apple Parts.com LINK
QUOTE Thanks
welshred

 
welshred's Avatar
 
Member Since: May 09, 2011
Posts: 53
welshred is on a distinguished road
Mac Specs: 2013 iMac 27" Intel i5 Processor, 16Gb RAM, 10TB HD (9TB External) , 2 x iPhone 5, 2 x iPad Retina

welshred is offline
Thanks for the links but I am in the UK
QUOTE Thanks
chscag

 
chscag's Avatar
 
Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 40,956
chscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond repute
Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, Yosemite

chscag is offline
Being in the UK shouldn't be a problem if an American parts supplier is willing to ship it to you. May cost a bit more though. Sorry, I don't know of any parts suppliers in the UK. Perhaps someone like "techiesteve" who posts here can help out. He's an Apple certified repair technician based in the UK. Send him a PM and ask.
QUOTE Thanks

Post Reply New Thread Subscribe


« Anybody buy a recent WD USB drive for their Mac? | iMac fan »
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
Imac 27" making weird noise edpau Apple Desktops 17 12-26-2010 11:16 PM
MBP trackpad making weird high frequency static noise when scrolling NICKST3R Apple Notebooks 0 09-02-2009 04:30 AM
Aluminum iMac making very odd and loud noise AustinD Apple Desktops 6 01-26-2008 06:00 PM
G5 making very high pitched noise corysw Switcher Hangout 6 04-27-2006 06:01 PM
Imac making odd noise.. i need help! tomasismyname Apple Desktops 1 11-28-2005 01:47 AM

All times are GMT -4. The time now is 06:11 AM.

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?