Hardware Test on 2009 MacBook Pro running El Capitain
Hi
I have a Early 2009 - 17-inch - MacBook Pro (2.66 ghz) - running El Capitain 10.11.6.
I want to run the Hardware Test & understand that I need to do it from the original software disks - which I have both of.
However - I've looked on the web & the suggestion is I need to hold down "D" whilst restarting and that'll initiate the process. I've tried that with both disks & it doesn't work. Also - tried holding down the "Option key" - no dice.
I'm wondering if - by installing El Capitain I've rendered the booting from disk process redundant? Or if I'm just missing something obvious.
Questions are:
How do I boot from the software disk?
Which disk do I use - 1 or 2?
Thanks
MacBook Pro