New poster, so be patient I have an iMac G5 (20 inch, 2004) given to me which I plan to let the children use. The previous hard drive seemed to fail. I replaced it with a 3.5 '' SATA. I have the original install CD; however, the computer does not recognize the install cd so that I can install the system. I get instead the folder and question mark icons. Based on my research, I think there is a firmware password in place that is not allowing the computer to recognize the new drive. I do get the lock and the right arrow icon. When, as instructed by one site, I pulled out the RAM and attempted to reset the PRAM (which was to erase the password), rather than get the multiple chimes, I only heard something more like a tone. Even though I held down the four keys for a few minutes, there was no second sound. I replaced the RAM and attempted to install using the original DVD again, and nothing changed: I was still greeted by the smiling folder and the question mark. Clearly, I think the problem is the firmware password. Is there a way of erasing it (I don't think tracking down the original owner is an option). Any ideas? Thanks for your help.