NEC 3550...I think it's kaput

I’ve had my 3550 (firmware updated) for about a year and it’s just recently given me problems. It will read and write to cds and it will burn to dvd media but it won’t read dvds. I did use it mainly as a reader along with my trusty nec 3520 so I’m guessing the lens has finally had it but I thought I’d come in and ask before I replace it with a new drive. What I’ve tried so far is:
Uninstalling the drive through windows w/auto install on reboot- no change
Installing the latest firmware- no change
roll back driver- no change
cleaned the drive with a few puffs of compressed air and checked all cables- no change
did I miss something or is it time to lay this baby to rest?