Dick Lenham

Q: Why is my Cinema Display 27" making a funny noise?

I booted up my MacPro this morning and my display is making a weird noise like the fan/blower is stuck or something.  If I put my MacPro to sleep for a while the noise goes away when I first wake it but after it has been running for a while the noise comes back.  Any thoughts?

Posted on Nov 14, 2013 10:09 AM

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Q: Why is my Cinema Display 27" making a funny noise?

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  • by FCPXLL,

    FCPXLL FCPXLL Dec 2, 2013 1:51 PM in response to Dick Lenham
    Level 1 (20 points)
    Dec 2, 2013 1:51 PM in response to Dick Lenham

    I too have this problem and I too think it is the fan cooling the screen that is making the noise because when I increase the brightness on the cinema display the noise gets louder and more intense. It sounds like the fan blades are going against something. When I plug the mag safe into my MBP things get really out of hand and the noise gets really loud and irritating.

     

    Does anyone have any thoughts on how to make sure what is the problem and how to fix it?

     

    Thank you.

  • by FCPXLL,

    FCPXLL FCPXLL Dec 3, 2013 6:28 AM in response to FCPXLL
    Level 1 (20 points)
    Dec 3, 2013 6:28 AM in response to FCPXLL

    Well, some development. I thought it was the fan making the sound but I have started to suspect that maybe the case is that the fans "intensity" somehow affects the speakers which amplifies the fan noise. (??) Could that happen? Or maybe it is not the fan at all and the electronics are affecting the speakers. Intresting indeed.

     

    Today I put my ear to the vent on the back of the screen (behind the stand) to listnen to the noise and it came out very loud, even louder than under the screen.  So I thought, well it has to be the fan then because that is where it is located. But as I read another post here on the forums from Bleengrass (https://discussions.apple.com/message/23999708#23999708) it struck me that it is also where the subwoofer is located. And thus it led me to belive in the theory that it is the speakers I am hearing.

     

    So now I am wondering what could cause this and how to fix it. I will go to the mac service store nearby this afternoon and hear what they have to say. I will report back!

     

    Stay tuned.

  • by FCPXLL,

    FCPXLL FCPXLL Dec 4, 2013 4:01 PM in response to FCPXLL
    Level 1 (20 points)
    Dec 4, 2013 4:01 PM in response to FCPXLL

    Ok, the visit to apple service center helped me not very much as anticipated. Of course they wanted me to carry the display to the store so they could fix it and that would probably cost me around 2000 swedish kronor (about 300USD) so that is out of the question.

     

    BUT!!

     

    I have stumpled upon a very intruiging thread where a guy has uploaded a video of the noise his display is making and it is identical to the noise I am hearing from my display! I was very happy to find this. The solution though seems a bit complicated to me as a novice in electronics but it involves swapping some parts on the power supply board in the display and I am tempted to give it a try.

     

    Check out the thread here:

     

    http://www.badcaps.net/forum/showthread.php?t=23699

     

    Intresting is it not?