Power Mac G5 Hard Drive Issue

[cmgoodbody]

I got myself a used Power Mac G5 without hard drive. The Person i bought it from had an 80 GB Seagate hard drive. i am replacing it with an 80 GB Western Digital. However i cannot get the machine to boot from the CD it just gives me a gray apple and an unending turning circle. i tried a different drive same make and model as the one i am trying to get the machine to take and the machine did boot from cd that time but didn't recognize the drive i assumed that was because it was an old windows drive.

I have combed every forum i could find online with relevant topics nothing has worked so far anyone have any ideas?

[Dr.Pants]

A) Zap PRAM. Dunno, but it works sometimes
B) Try an installation of a different OS (Say, Yellow Dog Linux). If it installs, your OS discs are bad, if it does not, your optical drive is bad. Methinks.

[gugucom]

Some discs do not work with certain G5 superdrives. I had a genuine educational Leopard disk that was reproduced (basically burned) and it never worked on a certain G5 drive. That drive took replicated (information molded) disks.