Resolved Buggered Video Card/Logic Board?

Discussion in 'iMac' started by SirCarrington, Apr 8, 2013.

  1. SirCarrington, Apr 8, 2013
    Last edited: Mar 5, 2014

    SirCarrington macrumors newbie

    SirCarrington

    Joined:
    May 16, 2012
    Location:
    Newfoundland
    #1
    I would like for someone to please confirm my diagnosis.

    I have a 24" iMac from around 2008-2010.

    It tries to boot into OS X, Apple logo shows up, thing spins for a bit and then it locks up.

    Will NOT boot from another working Snow Leopard install on a different HD (spins and locks up).
    Will NOT boot in safe mode (spins and locks up).
    Will NOT boot from Recovery (spins and locks up).
    Will NOT boot from OS install disc (spins and locks up).
    Will NOT boot from Techtool disc (spins and locks up).
    WILL boot in single user mode with full file access.
    WILL boot in target disk mode with full file access.

    Video Card/ Logic Board right?
     
  2. VideoBeagle macrumors 6502a

    Joined:
    Aug 17, 2010
    Location:
    App Q&A testing by request.
    #2
    I won't confirm, but it does sound like video/logic problems I've had on my MacBook Pro.
     
  3. gregorsamsa macrumors 6502a

    Joined:
    Apr 6, 2006
    Location:
    (Metamorphosing near) Staffs, 51st State.
    #3
    Probably the logic board. FWIW, my 20" iMac went in 2011 in less than 3 years.

    By the by, Apple seem to have had no end of quality control issues with batches of iMacs from that era. In this thread alone, there's a sample of a few hundred disappointed iMac users experiencing similar problems:

    https://discussions.apple.com/thread/1516765?start=345&tstart=0
     
  4. zuri macrumors member

    Joined:
    Mar 29, 2013
    #4
    Hi

    It looks you tried few ways to analyse the problem.
    Can you boot to verbose mode (cmd+v) and make a picture when it stops ?
    I can upload you proper EFI version of Apple service diagnostics for your machine if you specify what model you have.
    You can boot from that and make full diagnostics test.

    Let me know of any progress ;)
     
  5. SirCarrington thread starter macrumors newbie

    SirCarrington

    Joined:
    May 16, 2012
    Location:
    Newfoundland
    #5
    iMac (24-inch Early 2008)
    EMC: 2211 Model: A1225
    iMac24/3.06/2X1G/NVIDIA/500/M/K

    [​IMG]

     
  6. zuri macrumors member

    Joined:
    Mar 29, 2013
    #6
    It looks like something is stucked on system bus.
    I am going to analyze it more at home.

    For now, download this diagnostic tool for your machine.
    Burn it on usb thumb drive with disk utility and try to boot from it.

    It shows ASD EFI3S123 in boot menu.
    http://netload.in/datei2MkXVWGolk/ASDEFI3S123.dmg.htm
     
  7. SirCarrington thread starter macrumors newbie

    SirCarrington

    Joined:
    May 16, 2012
    Location:
    Newfoundland
    #7
    I ran the ASD and after 32mins everything passed. No lockups and no errors. Now I'm super stumped.

     
  8. zuri macrumors member

    Joined:
    Mar 29, 2013
    #8
    make SMC and PRAM reset and try to boot to last good known system, for example from some external drive
    did you run full HDD check test too? it is disabled by default
     
  9. SirCarrington thread starter macrumors newbie

    SirCarrington

    Joined:
    May 16, 2012
    Location:
    Newfoundland
    #9
    The first thing I did was a NVRAM and SMC reset. The hard drive is sitting in an enclosure on my desk and passed a seatools long test. Even with the drive out it still will not boot from a ML install disk. The spinny thing locks up. It won't boot from another OS X SL install either.

     
  10. zuri macrumors member

    Joined:
    Mar 29, 2013
    #10
    There is no HDD inside on SATA bus ?
     
  11. SirCarrington thread starter macrumors newbie

    SirCarrington

    Joined:
    May 16, 2012
    Location:
    Newfoundland
    #11
    Not at the moment. I just ripped it out.

    I will also add that I tried booting it with a working SL installation on a different hard drive internally, just in case my USB ports were fudged. Still locks up.

     
  12. zuri macrumors member

    Joined:
    Mar 29, 2013
    #12
    It will be good to see result of EFI and verbose with HDD inside.
    Can you post me those ?
     
  13. SirCarrington thread starter macrumors newbie

    SirCarrington

    Joined:
    May 16, 2012
    Location:
    Newfoundland
    #13
    I didn't think the SATA BUS was the issue because I could boot another mac from this one in target disk mode and I could access all of my files in single user mode.

    I believe that the verbose results may have been with the HD inside, but I am not certain. I will build up the energy to pull it apart again (it's currently completely assembled and looking pretty on my desk) and I will post results later.

     
  14. zuri macrumors member

    Joined:
    Mar 29, 2013
    #14
    ok, I just want to be sure
    wait for your progress :)
     
  15. michaeld4500 macrumors newbie

    Joined:
    Jul 30, 2012
    #15
    I had a customer with the same issue he took it to apple as he had reported the issue while still under warranty but it went away, then after some time it failed again if I recall they replace the logic board.
     

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