When the on button is pressed The fans start, but the screen doesn't even turn on. The Optical Drive still takes in Disks. No sound other than the fans, CD Drive (and possibly the HDD - hard to tell) It's running 10.5.8 3.06GHz 4GB DDR2 @ ~800MHz nVidia GeForce 8800GS 500GB HDD Tried: Turning off and on (hey… it works sometimes.) Resetting PRAM, Pretty much impossible as I don't get the first startup tone (also using wireless keyboard, doubt that'd work until it's started booting.) Inserting Snow Leopard Disk… Without any picture, sound, or input i can't think of a whole lot else i can do. Only recent change to hardware or software was attempting to use a wireless Microsoft mouse… Which didn't work, so I swapped it back. Any suggestions?