Hi, My 24" white iMac is all of a sudden suffering from burn in. There were 3 files on my desktop, now I deleted them and you can see where they were in the screen. I tried everything! Reset the pRAM, SMC, put on a white screensaver, etc, all with no success. It just happened "all of a sudden". Coincidently I was about to do a clean install of Leopard, and I think I noticed it as I was about to install Leopard (i cancelled the installation). The iMac is still under the one year warranty...what should I do? Thanks!