Is the Optical drive a part of your boot priority? Sometimes the BIOS will only show a device in the boot options if it is recognized by the system.
Try booting to a CD/DVD.
If that fails, remove the optical drive from the laptop, boot the laptop into Windows, once it is fully loaded, shut the computer down.
Reinstall the optical drive, making sure it is fully seated, then boot again.
When in Windows, open the disk manager
Press and hold the win button, then press "R" type;
Scroll throught the disks and see if your optical drive is shown.