After experiencing some problems with user accounts and having tried a variety of fixes I was advised (by staff at the apple store) to go for a complete "erase and install" using the Mac OS X Install discs which came bundled with my iMac G5. All went well and to plan and I got up and running following the reinstall. I was able to set up the new user accounts and establish my internet connection. All my data was backed up so no problem. That was until the machine was next shut down. On next startup all I would get in the middle of the screen was a small yellow folder with a "?". I tried to restart with the Install Disc 1 in the drive (hoping to be able to run some of the utilities). Well, the disk is still in there and I can't get it out. If I restart I first have to configure the bluetooth key board and mouse, choose a language etc then follow the onscreen instructions from the installer. The trouble is, when given the opportunity to run a disk scan, or determine where to reinstall, my Macintosh HD is not there ! All I can see is the optical disk. This means I cant run any of the utilities to check the HD or reinstall the OS. Have I killed it ? Whilst all my data was backed up and I have an iBook to keep me going it's totally horrible to have my beautiful iMac sitting there unusable ! Please any help or suggestions greatly appreciated.