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I can't load Apple Hardware Test on Mountain Lion

7775 Views 17 Replies Latest reply: Jan 16, 2013 12:56 PM by Linc Davis RSS
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cute crow Level 1 Level 1 (35 points)
Currently Being Moderated
Jan 15, 2013 9:13 AM

I've tried various ways of loading Apple Hardware Test on Mountain Lion as descibed by Apple:

https://support.apple.com/kb/PH11342

https://support.apple.com/kb/ht1509

 

Using a wired keyboard and with every thing else un-plugged I tried

Holding D at bootup

Option+D with WiFi on at bootup

Both ways failed.

 

Then I tried using my iMac's original Leopard DVD that has AHT on it. While it seems like its loading the mac  dies before it actually loads !

I did that twice and both times mac died before AHT could be loaded- like some one yanked the powercord out.

 

How am I suppose to load AHT ?

 

 

I upgraded from Snow Leopard to Mountain Lion on a 2009 iMac.

 

Thanks

  • babowa Level 7 Level 7 (22,100 points)
    Currently Being Moderated
    Jan 15, 2013 9:13 AM (in response to cute crow)

    If your Mac originally shipped with install disks, then that is what you need to use - did you see this part of the Apple article you said you checked:

     

    • For Apple computers that shipped with Mac OS X v10.5.5 to 10.6.7, Apple Hardware Test is located on the Applications Install  Disc 2 and should be included with your computer.
    • For some Apple computers that shipped with OS X Lion, if Apple Hardware Test cannot be found on the hard drive, an Internet-based version starts up instead. An Internet-enabled connection via ethernet or Wi-Fi is required to use this feature. Some computers that shipped with Lion require a software update to use this feature.  See Computers that can be upgraded to use OS X Internet Recovery for more information.
  • Linc Davis Level 10 Level 10 (107,995 points)
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    Jan 15, 2013 10:34 AM (in response to cute crow)

    Then you do, in fact, have a hardware fault.

  • Linc Davis Level 10 Level 10 (107,995 points)
    Currently Being Moderated
    Jan 15, 2013 11:58 AM (in response to cute crow)

    How do I determine what the hardware fault is?

     

    By taking the machine to an Apple Store to be tested.

  • ckelly176 Level 1 Level 1 (30 points)
    Currently Being Moderated
    Jan 15, 2013 12:29 PM (in response to cute crow)

    I guess the question to ask is, why are you trying to run AHT? What is your machine doing that has a need to run a hardware test?

  • babowa Level 7 Level 7 (22,100 points)
    Currently Being Moderated
    Jan 15, 2013 12:47 PM (in response to cute crow)

    It could be a dying hard drive or faulty RAM or a defective logic board..... lots of different possibilities.

     

    FWIW, the hardware test does not catch everything, so it not as conclusive as the testing equipment they have in an Apple store or AASP. Do you have an authorized repair service in your country?

  • babowa Level 7 Level 7 (22,100 points)
    Currently Being Moderated
    Jan 15, 2013 1:09 PM (in response to cute crow)

    Freezing is quite often also a software issue; if it happens right after a major upgrade, the usual suspects would be incompatible software applications or a system that already had some problems (upgrading does not fix problems; instead, it makes them more noticeable). Also, since Lion and ML are memory hogs, the 2 GB RAM minimum is just that: a bare minimum - 4 GB would be a far most realistic minimum.

  • Linc Davis Level 10 Level 10 (107,995 points)
    Currently Being Moderated
    Jan 15, 2013 6:17 PM (in response to cute crow)

    Is there no way to download AHT an put it on a USB or something?

     

    No. Assuming that the disc is not damaged or defective, the problem could be just a dirty lens in the optical drive. Try running a cleaning disc through it. Also make sure you've disconnected all wired peripherals except the keyboard and mouse, if applicable.

     

    If there are no Apple Stores where you are, go to an authorized service facility.

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