I have a sony-dru720a i have burned about 200 plus dvd's and now i am having problems. I thought it was the disc but i have tryed all different brands (sony,tdk,etc) I use dvd shrink and nero. i am able to upload the dvd to my cpu but when i go to burn it i either get a error or says it has finished burning and then when i got play it in my stand alone dvd player which plays everything it doesnt play. It also looks like nothing was writen on the bottom of the dvd. I get about 1 out of 5 dvds to work. I am wondering if my dvd burner went bad.