iMac made a loud 'pop' sound when pressing the power button.

Discussion in 'iMac' started by MrRoberts, Oct 11, 2006.

  1. MrRoberts macrumors newbie

    Oct 11, 2006
    A friend of mine has a blue fruit looking iMac (600MHz, 256MB, CDRW) and it just died.

    Every time my friend pressed the power button it makes a 'pop' sound and that it is. It doesn't power up.

    I tried the reset button inside the iMac next to the RAM slot, which didn't help.

    What is wrong?
  2. mad jew Moderator emeritus

    mad jew

    Apr 3, 2004
    Adelaide, Australia
    If the pop is the only response you get then it's quite likely you have a power supply issue. Replacing the power supply might help, but I doubt it's worth it. :eek:
  3. Counterfit macrumors G3


    Aug 20, 2003
    sitting on your shoulder
    A common part to blow on those iMacs is the power inverter. It's possible to replace it, but it's probably too much of a hassle.
  4. MrRoberts thread starter macrumors newbie

    Oct 11, 2006
    I thought it might be the power supply and it is really that hard to replace it?
  5. MrRoberts thread starter macrumors newbie

    Oct 11, 2006
    I took it apart, pressed the reset button and checked the 3.6v battery with a multi-meter, which gave out a 3.49v reading.

    Put it all back together, pressed the power button and behold!... it came up. Seconds later, it made that loud 'snap' sound before shutting down again.

    It is really the power supply?
  6. RobTuck macrumors regular

    Sep 19, 2006
    It sounds like something may be shorting. Any chance some dust/debris might be floating around inside?
  7. savar macrumors 68000


    Jun 6, 2003
    District of Columbia
    Sounds like it has to do with the power supply. IF you can turn the computer on for a bit after its been off for a while, then it sounds like something in the power supply is heating up, expanding slightly, and causing some sort of failure.

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