Not sure what I should do. I've got an early 2009 24" iMac with 8GB or RAM. Problem is that I'm running quite low on disk space. I figured might try upgrading the hard drive, but I've been noticing a lot of ghosting on the screen lately. It looks a lot like monitor burn in, however I know it's heat related, as it goes away when the machine is off for a while, and when it comes back, it's always a different "burn in" than the last time. i.e. whatever happens to be in that spot on the screen when it heats up enough. I've noticed that the "burn in" will both when the system is idle at the desktop, or if I've been playing video games. My concern is that I don't want to spend the time/money to upgrade the hard drive if the machine just going to fail due to heat issues. Has anyone else experienced similar issues? Did a Hard drive replacement help? Would swapping to an SSD help with heat? Or am I at the beginning stages of heat death? The ghosting is around the upper left side of the screen if that helps. Also, I've blown the dust out of all the external ports and I've installed SMCFanControl and it has mitigated it somewhat, but the problem just returns.