_NEC DVD_RW ND-3520A now not reg blank disk

I have been using my _NEC DVD_RW ND-3520A writer for a year without problems, then the other day, flop. Now all of a sudden it does not register any blank cd or dvd disks and it does not want want to burn. How can I have this repaired without going through these “registery fix” sites. Will really appreciate help :smiley: