Will not read dvds

[qanda]This question is published in the hardware section for the Lite-On DH-20A4P. Click here to view full specs.[/qanda]My Lite-On DH-20A4P-04 will not respond to any dvd in the drive.

Provide some information please. What brand/model computer do you have (give some specs)? What operating system do you use? Can the drive read commercial DVD’s (a movie) or CD’s? Did this problem just start, were you ever able to burn a CD or DVD? What brand of blank DVD do you use? What burning program/s do you have?