Resolved apple hardware test error 4vdc/1/40000003:videocontroller

Discussion in 'Mac Pro' started by englishman, Jun 18, 2016.

  1. englishman macrumors 6502a

    englishman

    Joined:
    Nov 6, 2006
    #1
    Ran a routine AHT Apple Hardware Test on my 5,1 firmware upgraded Mac Pro 2009 that works fine and got this error:

    apple hardware test error 4vdc/1/40000003:videocontroller

    As I am having no issues I guess I can just ignore it.

    Its running the stock GT120 that came with it.

    Any suggestions welcomed thanks.
     
  2. Macschrauber macrumors member

    Joined:
    Dec 27, 2015
    #2
    I read that several times. Most say it's due to the firmware upgrade.
     
  3. englishman thread starter macrumors 6502a

    englishman

    Joined:
    Nov 6, 2006
    #3
    Thanks I thought it might be - running the 5,1 AHT on a 2009 machine.
     
  4. 666sheep macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #4
    If it ain't broke, don't fix it.
    AHT, ASD are useful only when the problem will occur, not before.
     
  5. englishman, Jun 20, 2016
    Last edited: Jun 28, 2016

    englishman thread starter macrumors 6502a

    englishman

    Joined:
    Nov 6, 2006
    #5
    I ended up downgrading the firmware back to 4,1 from 5,1 and AHT now shows no errors. Hey! Hey!

    Was quite a fiddle to get the downgrade to work - had to download and rename both firmwares so the tool would work, and also disable SIP.
     
  6. Macschrauber macrumors member

    Joined:
    Dec 27, 2015
  7. englishman thread starter macrumors 6502a

    englishman

    Joined:
    Nov 6, 2006
    #7
    Another minor issue was when I downgraded the firmware, Windows under Bootcamp saw this as a change so I had to reactivate my copy of Windows.
     
  8. sonofsnak macrumors newbie

    sonofsnak

    Joined:
    Apr 27, 2016
    #8
    I just upgraded my Early 2009 Mac Pro from 4,1 Quad Core to 5,1 6 Core, original GT120 and got the same error.
    No issues.
     

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