LG gsa-4166b not working with DVDs please help!

My DVD burner gsa-4166b is not reading DVDs at all… It works with Cds only… I am not sure why… Any tips? Pointers? Or remedies?

Is it the same burner from here. http://club.cdfreaks.com/showthread.php?p=1378201#post1378201
Can you burn with it.

My guess is the laser for dvd finally died.

If you can boot from a dvd (I use a Knoppix dvd), just to eliminate software errors,
your drive is OK. If fail, time to buy a new one.