Let me explain, I was using my computer (original 17" iMac Core Duo) and while im browsing the web, my screen turns a light grey. I panic and shut him down. So, everytime I turn him on, it has the start up chime and boots normally except for the SCREEN IS GREY. DISPLAYS NOTHING. The hard disk is viewable and accesable to my Dell notebook on the network. The screen is just grey. I have unplugged all hardware and tried to zap the PRAM but it doesnt chime more than once. This computer is no longer under warrenty, so ANY help is appreciated. Thank you!