I was going to optimize my Dads Imac with Norton Utilities 8.0. This version is compatible with OS 8,9, and 10. To boot up from CD in OS 9, I was supposed to hold the option key down, but forgot and held the C key down (OS10) . I listened to the CD rom operating for awhile and no screen, and rebooted the system. After that I have never got a screen back. Will not boot from "any" bootable CD. Tried holding option, apple, P, R, to reset pram. It bonged twice and shut down. Now when I turn it on...it bongs once, pauses for few seconds and shuts down, light goes out. I have to unplug power and plug back in to try again. Reboot button doesn't even work. OH CRAP! HELP?