So... decided to start up my MDD 800 1.25Ghz and at first got the flashing system folder icon. So i put in a 10.5 install cd in and restarted. At first it started and i could hear the computer starting up but no picture on the screen. So i unplugged it and waited about 10 minutes. Then turned it on and after a few seconds got the startup chime and then the apple logo and the cd started to spin up and then got the following kernel panic: I already tried replacing the motherboard and ram with no help. If you have anything i would appreciate it.