System ran fine on MacOS 8 Started to Install MacOS X things seemed to go ok. But, was taking hours to start. Realized I had forgot to upgrade the Firmware before Installing MacOS X. Shut down the computer. Now it will start up breifly then shutdown. Have attempted all the usual things like inserting CD booting with C key. Tried to get into firmware with command-option-o-f however nothing seems to stop the behavior of it shutting down. Shortly after I hear the cd spin up. Any ideas how I can get it to respond to something?