Hi all, Apologies for my first post being a plea for help, but I've looked everywhere for an answer. My iMac 24" early 2008 went caput. The screen was covered in a kind of herringbone pattern as per the first photo. I tried the single user boot and the fsck repair attempt. It came up that files had been modified but couldn't be repaired and eventually it was suggested on another forum that it was a hard drive failure. I bought diskwarrior to try to recover as much data as possible and bought and installed a new hard drive, but the same graphic issue came up as per the second photo. So it was then suggested that it was the video card. After having a look online, it looks like the video card is replaceable and being a have ago kind of gal (who is also almost broke), I want to try and do it myself. Thing is, which one do I get and are they available in the UK? Any help, advice warnings or whatever gratefully accepted!