I had a disc that can't be read any more by the player so i cleaned everything..an yet it won't read itClean the disc check the machine..mmi don't know what to do any more.i tried to see if the 'burner' could read it it was not 'Chinese' to him.So i told to make a copy for me..it did and the machine can read the copy but not the original what ever happened in between i can not explain.