Ive noticed that 1633S is having lot of difficulty reading DVD disc. I only had this drive no more than 3 weeks. I was trying to make an ISO images of the of my movies I own (The Hitcher, bought it at target for $7) and disc never get recognized. Of course if I put it in my Nec 1300, it sees it fine. I’ve tried couple more movies and same result. Two more movies I’ve tried also did not get recognized (one was brand new disc, no scratches, another disc did have lot of scratches). I am currently using CS09 firmware.
I was thinking about either flashing to firmware to BS41 or BS0S stock. I’m really trying to give this drive the benefit of the doubt but more and more I’m thinking about taking it back (either get BenQ or Nec 3520)