hey everyone. i have had my dual 2 ghz powermac g5 for about a month. when i first got it i never heard the superdrive make any noise. now whenever i put in a cd i hear the drive rev up and i hear alot of scratching. i dont know if "scratching" is good word choice but thats what it sounds like. all of the cds/dvds mount fine. i hear it spin then just start to scratch inside the computer. it mostly happens right after i put in the cd/dvd. after a couple seconds it goes away. any idea on how to fix this? it is loud and VERY annoying. thanks for the help and sorry for my grammar.