24" iMac hissing noise

[eenu]

Only just noticed this on my 24" iMac. if you are looking at the iMac from the rear the hissing comes from the top right corner. You can hear it when the iMac is powered off or when it is in sleep mode. It sounds like a psu hiss...

Can all iMac users please check theirs for me and let me know.

EDIT: You have to put your ear quite close to the heat vent and also have a quiet room

http://docs.info.apple.com/article.html?artnum=60199

 

[mongoos150]

Sounds like normal computer sounds...

 

[Zwhaler]

Mine sounds normal.

 

[eenu]

notice your both 20" owners....

 

[GimmeSlack12]

Only just noticed this on my 24" iMac.

I don't have an iMac so therefore I offer absolutely no solution to your problem. PSU = Pretty *****ty Underwear hehe...

 

[eenu]

come on people......can't believe out of this whole forum i only get 7 iMac users responding!

 

[Macmadant]

Mine has a slight buzzing sound but not a hissing, and it doesn't emit any sound whilst asleep

 

[eenu]

Mine has a slight buzzing sound but not a hissing, and it doesn't emit any sound whilst asleep

Is your 'buzzing' sound occuring when the machine is off?

 

[puckhead193]

did u ever think it just doesn't like you...
My 20" hasn't made and weird noise... but their was this one time... o never mind.. but no my imac is normal