Traduzione in corso passo 3
Remove HD, Superdrive and motherboard. Follow the excellent iFixit guides to remove these items.
To remove motherboard (a little tricky), I followed this excellent guide - http://www.btobey.com/learn/imac-ssd-ins...
Not mentioned in the guide is that you have to remove the IR sitting in back of the front Apple logo before you can remove the motherboard.