iMac 27 Inch make buzzing noise

Question

iMac 27 Inch make buzzing noise

Hi,

I have an iMac 27 inch (late 2012) and since a few hours the screen (i think) makes a buzzing noise depending on the color on the screen. (full screen)

Red: makes a buzzing noise

Green: makes a buzzing noise

Blue: makes a buzzing noise

White: no noise

Also when I make the display brighter or darker i hear the sound.

Using os x Yosemite 10.10.5

Does anyone has an idea to fix this?

Regards,

Denny!

iMac, Mac os X 10.10.5

Posted on Aug 31, 2015 1:07 PM

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Answer 1

rkaufmann87

Level 10

140,532 points

Aug 31, 2015 2:09 PM in response to Denny.goosensen

Out of the ordinary noises as you describe are extremely difficult to diagnose in a forum. You can attempt some basic resets, such as a SMC and PRAM resets however beyond that you will likely need to take it to an Apple Store or AASP to be looked at. If you are not familiar with either the SMC or PRAM resets, instructions are in iMac SMC and PRAM reset

Good luck

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