Maybe you should have followed the iFixit explanation on their website. The Youtube explanation is not enough. The 3 connectors to disconnect are indeed tiny. And one need the right screwdrivers. This is the website I used for our 24" iMac. <http://www.ifixit.com/Guide/Installing+iMac+Intel+21.5-Inch+EMC+2389+Dual+Hard+Drive/8643> Paul Moortgat On 24 Dec 2013, at 22:44, Andrew Lynch wrote: > I tried the same thing with my 2009 27" i7 iMac. Not an easy job. It cost me over $600 to repair the damage I did. Some of the connectors on the motherboard are tiny and very fragile. > > Drew > > Sent from my iPhone > >> On Dec 24, 2013, at 12:37 PM, Paul Moortgat <paul.moortgat at pandora.be> wrote: >> >> The Western Digital drive in our iMac 2008 broke down. I had to replace it with the backup one I made with Superduper!. >> It took me 2 hours to do so. I found the help I needed on the iFixit website. I borrowed 2 sucking caps from my garage to remove the glass in front. >> It almost fall out of it. Just magnets keep it there. I also ordered a new (Toshiba now) drive to act as new backup. >> >> Paul Moortgat