27” iMac i5 goes tick, tick tick

Discussion in 'iMac' started by Charliebird, Mar 15, 2010.

  1. Charliebird macrumors 6502a

    Mar 10, 2010
    I’ve gone through a rash of late 2009 iMac’s and three of them including my current 27” iMac i5 make a ticking noise. It’s a quiet noise, the interval is about 25 seconds, and it’s hard to pinpoint where exactly it’s coming from. I don’t think it’s a mechanical component since it keeps making the noise after the machine is off for a minute or two. My only thought is that it’s related to something expanding in the system as it warms up and cools down. I have a Playstation 3 that made a similar noise for about the first six months I owned it. Anyone here having a similar experience?
  2. MacHamster68 macrumors 68040


    Sep 17, 2009
    motorcycle engines made from alloy do the same you can hear them ticking alloy is expanding and shrinking and causes a ticking noise ,if there is not enough space to expand , so once it has made itself enough room it will at one point stop with the ticking
  3. peskaa macrumors 68020


    Mar 13, 2008
    London, UK
    Is your hard drive made by Seagate? If so, it'll be the drive ticking!
  4. Charliebird thread starter macrumors 6502a

    Mar 10, 2010
    It does have a Seagate harddrive however the machine continues to make a ticking noise after it has been turned off for a minute or two.

  5. Jarooda macrumors member


    Mar 13, 2007
  6. Charliebird thread starter macrumors 6502a

    Mar 10, 2010
    Apple's revenge for me going through six systems!

  7. tbullock macrumors newbie

    Jul 5, 2008
    Did you ever get this resolved? I have the same thing in my 2011 iMac and don't remember it in my 2009. It's annoying and I am contemplating getting a replacement.
  8. Stan Mikulenka macrumors 6502

    Nov 20, 2009
    Calgary, Canada
    Hi tbullock,
    this is usually the result of using the new line of "green" drives what almost all manufacturers use ⇒ the HDs park their heads every so often (usually 20 ~ 45 sec) to save "energy". And it can't be changed (at least not on Macs...).
  9. Georgio macrumors 6502


    Apr 30, 2008
    Essex, UK
    Ah now you've gone and spoilt the illusion of a bomb ticking away, is the keyboard in Afghanistan as well? :eek:

  10. tbullock macrumors newbie

    Jul 5, 2008
    Hi Stan-
    Thanks, I can assure you it's not a hard drive issue. The noise persists when the hard drive is spun down. The noise also happens on either side of the iMac at random intervals, and continues after it is powered off completely as it cools down.
  11. Zelnaga macrumors regular

    Jun 4, 2010
    Im worried! Ive had this problems with external monitors before (PC) and I sleep next to my comp, and the ticking drove me mad I had to return it, cause it goes along time for the ticking to stop.

    Is the iMac the same or does it eventually stop? The ticking, while im trying to sleep drives me nuts.

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