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ABMorley

Q: Holding down "D" no longer starts Apple Hardware Test!  Any idea what's happened and how I fix it?  Or do I need to go to the Genius Bar?  MacBook Pro with Lion Preinstalled.

I have a MacBook Pro with Lion Preinstalled, so AHT was present on the hard disc and worked when the product was new.  One of the first things I did from new was run AHT and it worked fine.  But now it doesn't start - instead the machine (eventually) boots into normal OS X.

 

Holding down "D" no longer starts Apple Hardware Test!  Any idea what's happened and how I fix it?  Or do I need to go to the Genius Bar? 

 

Software  Mac OS X Lion 10.7.3 (11D50b), if it makes any difference.

 

Any ideas?

MacBook Pro, Mac OS X (10.7.3)

Posted on Feb 28, 2012 1:08 AM

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Q: Holding down "D" no longer starts Apple Hardware Test!  Any idea what's happened and how I fix it?  Or do I need to go t ... more

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  • by ds store,

    ds store ds store Feb 28, 2012 1:23 AM in response to ABMorley
    Level 7 (30,395 points)
    Feb 28, 2012 1:23 AM in response to ABMorley

    Yes, make sure you have a Internet connection first, then reboot holding the D key and wait for it to be downloaded, takes forever.

  • by ABMorley,

    ABMorley ABMorley Feb 28, 2012 11:43 PM in response to ds store
    Level 1 (0 points)
    Feb 28, 2012 11:43 PM in response to ds store

    Thanks.  However, even with an internet connection that doesn't work for me - the machine just (after an extended delay) boots normally.  It doesn't download.

     

    Option-D works for an Internet-based AHT.  However that only works with an internet connection.  It doesn't seem to download it and install it - it needs internet every time.

     

    Any idea how my local copy of AHT disappeared?  I haven't repartitioned the drive or knowingly deleted anything.  And how do I reinstate it (because if you need AHT your hardware problems may preclude internet access!)?