Gsa-h10n wont burn dvds anymore

just yesterday i was able to burn dvds, now it wont burns dvds anymore. when i burn a dvd with nero, it goes up to 3% or sometimes 5%, stops and freezes. yet im pissed off becuase i wasted so much dvds!
even if its working, it gives out a fail to burn dvd error. right now im forced to use my laptop dvd-burner, that only burns up to 2x!!!

sorry im new here.