My wife has a dell inspiron 8500. Recently it fails to recognise the dvd-rom. If you press the eject button on the dvd the little light comes on for a mo but nothing happens. Look under My Computer and it does not seem to exist. If you try to boot up with the dvd-rom in place you get a message saying unidentified hardware (or something like that) and it will not boot any further than this until you physically remove the dvd-rom. I have tried 'Install new hardware', error-checking. When I looked under Device Manager it tells me the hardware is working properly. Any ideas before I take it in for repair?