Ok so here is what I know that I did and I am completely clueless on how to fix it. I bought the iMac from ebay and it did not come with original restore discs. I had a copy of OS X 10.4.8 that I was trying to use to do a clean format to get all of the old owners information off, It would not boot from dvd, but it would boot up originally, so I started it from disc but no install options, just packages and such, so i clicked on the os x package install and it installed and then restarted. Now it wont load up at all past the gray apple screen with the gears under the apple. I have been reading trying to figure out what to do, since using the restore discs isnt an option, I have reset the pram. When I go into Single User Mode now it hangs up at the the CSRHIDTransitionDriver:robe booting in single user.. do not match line and wont give me a command line. It wont boot from the copy of the os x or a copy of os 9. I really dont know what to do as Im a pc user not an imac user. It is a slot loader. Please any help on what to do would be greatly appreciated.