I have a Early 2008 quad mac pro hooked up to a samsung monitor. I was watching a movie then all of a sudden the image became scrambled. I restarted the computer now the monitor only displays a black image. I tried this with another monitor and it too shows only a black image. If I press the volume keys I can hear it go up and down but the sound only comes out from the computers internal speakers. I tried to reboot from the cd and that won't even work. I tried resetting pram and unplugging everything and still no go. Please help, I have no applecare and have a report due tomorrow!