Would really appreciate your help as I have spent a day trying to figure this out. I have have a Hitachi - LG data storage dvd rw drive in my PC. It is model GWA-4164B E114(firmware?). It can read a cd-rom but does not recognize a dvd. When dvd is inserted, light blinks green, but no disk shows in explorer or if you double-click drive, it says no disk is inserted. Appreciate any help!