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  1. #1
    iMac stuttering and and doing strange things!

    Member Since
    Apr 04, 2010
    Posts
    10
    iMac stuttering and and doing strange things!
    Recently, my iMac has started to stutter when I'm doing anything, e.g playing a movie file, it starts stuttering, and then the video will stop while the audio continues...

    In Logic, it won't play a song, starts OK, then starts stuttering, then comes to a stop.....

    In general use, the cursor will not move smoothly, when I move my mouse, it jumps across the screen, missing out all the space between....

    When I reboot, it's ok for a few minutes,then starts, and gets gradually worse until I need to reboot again.

    It started a few weeks ago, but is gradually getting worse, to the stage where I can't do much on my mac.

    iMac 24", 2.4 GHz Intel Core 2 Duo, 4GB 667 DDR2 Ram, 1TB HD.

    Also, I've repaired disk permissions, to no avail.

    Any advice appreciated please.

  2. #2
    iMac stuttering and and doing strange things!

    Member Since
    Sep 10, 2011
    Location
    Colne,UK
    Posts
    1,736
    Specs:
    iMac 27" Mid 2010, 3.2GHz Intel Core i3,12GB 1333 MHz DDR3, ATI Radeon HD5670 512MB, Yose 10.10.5
    Quote Originally Posted by speni View Post
    Recently, my iMac has started to stutter when I'm doing anything, e.g playing a movie file, it starts stuttering, and then the video will stop while the audio continues...

    In Logic, it won't play a song, starts OK, then starts stuttering, then comes to a stop.....

    In general use, the cursor will not move smoothly, when I move my mouse, it jumps across the screen, missing out all the space between....

    When I reboot, it's ok for a few minutes,then starts, and gets gradually worse until I need to reboot again.

    It started a few weeks ago, but is gradually getting worse, to the stage where I can't do much on my mac.

    iMac 24", 2.4 GHz Intel Core 2 Duo, 4GB 667 DDR2 Ram, 1TB HD.

    Also, I've repaired disk permissions, to no avail.

    Any advice appreciated please.
    Hi, it seems a strange one. I would firstly power down and remove the power lead and check it for nicks and creases and make sure that it is seated correctly when you reboot. If you can...swap it out for one that you have borrowed from someone.
    iMac 27-inch Mid 2010 (wow....that old...eeeks!), WD My Book 1TB Firewire,WD My Passport Air 500GB, Magic Mouse,Magic Trackpad,
    iPhone 5C, iPod Nano 4GB 3rd Gen, ATV2.
    MOTM October 2012. These days normally happy with an occasional grumble.

  3. #3
    iMac stuttering and and doing strange things!

    Member Since
    Apr 04, 2010
    Posts
    10
    OK, thanks for that.

    I couldn't see any dirt etc. on any contacts, but I've replaced the power cable with another. I'll do some work, see how it runs, and post back.

  4. #4
    iMac stuttering and and doing strange things!
    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,480
    Specs:
    iMac late 2007 10.11.b4, iMac 2008 10.10.5, Macbook2007 10.7.5, Mac Mini 10.7.5, iPhone 3GS Note 8!!
    If that does not help, open Disk Utility in Utilities and check the Hard Drives SMART Status at the bottom? Does it say Passed or Failed? I have seen some of your symptoms when the hard drive is starting to die.

  5. #5
    iMac stuttering and and doing strange things!

    Member Since
    Apr 04, 2010
    Posts
    10
    You're a genius!! Replaced the power cable, and all seems well! Many Thanks.

    Also thanks dtravis7, checked the status, VERIFIED, so I hope all is well.

  6. #6
    iMac stuttering and and doing strange things!

    Member Since
    Sep 10, 2011
    Location
    Colne,UK
    Posts
    1,736
    Specs:
    iMac 27" Mid 2010, 3.2GHz Intel Core i3,12GB 1333 MHz DDR3, ATI Radeon HD5670 512MB, Yose 10.10.5
    Quote Originally Posted by speni View Post
    You're a genius!! Replaced the power cable, and all seems well! Many Thanks.

    Also thanks dtravis7, checked the status, VERIFIED, so I hope all is well.
    Well that's made my day after a terrible round of golf!!
    iMac 27-inch Mid 2010 (wow....that old...eeeks!), WD My Book 1TB Firewire,WD My Passport Air 500GB, Magic Mouse,Magic Trackpad,
    iPhone 5C, iPod Nano 4GB 3rd Gen, ATV2.
    MOTM October 2012. These days normally happy with an occasional grumble.

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