If this is the 333Mhz tray loader model, and you did not install OS9.2.2 first, AND update the firmware to 1.0 ( NOT 1.2)from apple downloads, then you have a problem. If you did not do both these things, your installation of OS X has caused the display failure. There is a guy in the USA who will repair it for $80. It is a well documented problem, so google it and you will learn more. Good luck.