My model of dvd rw is "sony dvd rw dru 830 a".My dvd writer produce problem.It can not able to read cd & dvd.when i am trying to contact with the sony help center they tell me to" contact with the dealer we can't do anything".science the warrenty periode is over so the dealer advise us to buy new dvdrw. i want to repair my dvdrw by sony.please help me how i can proceed.if it is not possible please advice me which dvd rw is best for me.which can solve the above problem in future.