assuming the power and SATA cable are connected
and you can see in BIOS that its listed in the boot order
Then you have a faulty dvd drive .
You can open it with a paper clip . Insert in to the tiny hole on the front by the tray . It may still read and write .....just not open
Thank ou very much. I took your advice and checked the cables and it turned out to be a faulty sata cable, so iput a new in and it works great.