Can't get into Apple Hardware Test mode

Hi,
I want to run a hardware test, but when I follow all the instructions laid out (insert install disc (in my case Leopard 10.5.4), restart mac while holding the D key) the mac just continues to boot up as normal.
I don't understand why it's not booting in AHT mode. The Leopard disc isn't the original install disc that came with the machine, the original discs would've been Tiger, but this is a bought and paid for Leopard dvd. AHT should be on there right? I don't have the Tiger discs anymore.
Lee

HI Lee,
You need the original install disks that came with your iMac in order to run the Apple Hardware Test. Those disks are "*machine specific"* ...
The Leopard disk you purchased is just the Mac OS X for Leopard install disk...
Contact AppleCare here: http://www.apple.com/support/products/ and see if they can help you.
Carolyn

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Re
extract from kb article
PPPoE (where there is no router handling the PPPoE connection)
No
No
Captive-Networks (where you click an "Agree" button to access the Internet)
Yes
No
Proxies (where specific proxy servers must be configured in network preferences)
No
No
Certificate-based authentication / 802.1x
No
No
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ezgoodnight wrote:
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http://support.apple.com/kb/HT5312
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Can't get into Apple Hardware Test mode

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