Extended hardware test came back with no problems. Let the head scratching commence once again.
It's been a few years since I last worked with Macs but resetting PRAM often sorted funny issues, not sure if it's still relevant though. 'CMD + OPT + P + R' after pressing the power button.
Like I said it may not be relevant on newer macs.
You could also try resetting the SMC. This differs from machine to machine so you would need to find out on Apple's pages what the process is for yours.
Laptops also require the battery to be removed as well.
I think I have now sorted this. Resetting the PRAM then allowed me to boot into safe mode, which then after a few restarts I was able to get into Lions recovery hd. Although the drive came back from disk utility as unrepairable, I then tried to erase the partition but couldn't do that either so I have just ended up formatting the whole drive instead of that 1 partition. It is now rebuilding with Deploystudio so fingers crossed it all comes together. Thanks for all the help!
mac_shinobi (29th May 2012)
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