Hi, This is my first post here and I need some help. I have an 18 months old iMac (2.66 GHz Intel Core 2 Duo) - Yesterday I was watching this DVD and I got a message "Skipping over damaged media". The DVD didn't go any further. I ejected it and inserted it again but it gave me the same error again and stopped. Since then I haven't been able to eject or play the DVD. The disc isn't even showing on my desktop. When I click on DVD Player, it gives me this message "a valid dvd drive could not be found 70012" I have tried a few things like holding the mouse down while rebooting but it won't work. I tried rebooting while holding the options/control keys but it won't show the disc. Can you please help me get rid of this problem? Thanks in advance.