Sony DVP-NS9100ES "cannot read" DVD error?

Really like this player that I use almost entirely for listening to music, which it still plays just fine, but just recently stopped reading any DVD and gives an error of "CANNOT READ" on the unit. I already tried unplugging, and resetting. Curious if there is another simple fix, or if anybody is aware of a really good service center. It is just too good of a player to not investigate further before replacing it. Thank you.