Problem with my LiteOn 812s US0Q DVD BURNER

Hello
Im Lyes from France
I have a big problem with my LiteOn 812S US0Q DVD BURNER, my LiteON read and Burn NOW only cdrom and do not arrive to read any DVD and olso burn any one; I have update my firmware as you explained on the site but nothing, he still read only cdrom
What is exactly the problem and what I can do for fix it please?

Probably you cannot do much here.

Try to access dvd media from SAFE MODE or real DOs, try to clean the drive/lens and test the drive in another computer.