Sony dw-u18a not reading blank dvd?

i dont know how it happened but now my drive does not find blank dvds. it just doesnt show up as if its an incompatible disk. it reads dvds with data on it, reads blank cds, and data cds but not blank dvds. i tried upgrading the firmware to the 832s but then it wouldnt read anything (unless i did something wrong)

Reading blank DVD is useless.

Open a burning app and let the drive recognize the media.

thats the problem. its acting as if theres no disk in there. i cant burn anything cause the software/computer/drive/everything is saying theres no disk in there