Have you tried taking the drive out.
dose the dvd drive show in the bios
dose dvd show in winodws ?
do this in windows
- click on Start and then Run.
- Type the following Disk Management command in the text box:
diskmgmt.msc
press enter
Wait for a bit
look to see of you see line under the heading file systm called UDF or pictuer of a CD roms
The check to see