It just happened today. I can put in any dvd or cd even blank ones and its like it won't even attempt to read (no spinning noise). I don't know what to do. It's an iMac g4 1.0ghz superdrive and it ejects fine. Any help would be amazing. I restarted, shutdown, and now i'm repairing disc permissions. I hope this isn't the end of the superdrive. Also, any guesses on how much it would be to replace the superdrive?