New iMac making a high frequency noise when OFF?

Discussion in 'Macintosh Computers' started by Lars Petersen, Dec 24, 2005.

  1. Lars Petersen macrumors newbie

    Dec 3, 2005

    I don't know if i have some kind of super ears or...

    But my new 20" iMac (the one with isight build in) makes a very high frequency noise when it is off. Only when it is off actually.

    It can be compared to the high frequency noise a normal television makes.

    What about yours??

    Mery Christmas everyone!

    Kind regards,
    Lars Petersen
  2. Morn macrumors 6502

    Oct 26, 2005
    I once had a CRT that did that, very annoying. A noise doesn't mean there is a serious problem though, just don't switch it off put it on sleep.
  3. Lars Petersen thread starter macrumors newbie

    Dec 3, 2005
    Thank's for a quick reply.

    Actually, every TV makes this noise when they are on, but not all people hear it. But i have never heard it with a pc before, when it is turned OFF?
  4. Macky-Mac macrumors 68030


    May 18, 2004
    when it's OFF?????

    leave the room immediately, do NOT look
  5. Nermal Moderator


    Staff Member

    Dec 7, 2002
    New Zealand
    That's very weird! I know the sound you're talking about (a muted TV drives me crazy!) but I've never heard of anything doing it when the system is turned off. I suspect it's the power supply (there's not much else it could be), and presumably the noise stops when you unplug the computer. If not, then you have gremlins :p
  6. mad jew Moderator emeritus

    mad jew

    Apr 3, 2004
    Adelaide, Australia
    Yeah, that's weird. I don't suppose it's an external drive or something else attached to the Mac. My iMac makes no noise when it's off. :eek:
  7. Lars Petersen thread starter macrumors newbie

    Dec 3, 2005
    Yea, I suspect the power supply also. It disappears when I unplug it totally (no Gremlins ;-)). It strangely also disappears when I turn it on. I was just wondering if anyone else had this noise? If I am the only one, then I will call Apple abut it.
  8. mjstew33 macrumors 601


    May 29, 2005
    Yeah, I have the new iMac and I don't have that problem. Call Apple.
  9. Morn macrumors 6502

    Oct 26, 2005
    I doubt it's a serious problem, just ignore it and just don't turn it off.

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