Been using a 9100 ES since 2004. Replaced the lasers once in 2012. Try using compressed air gently sprayed into the drive. You may also want to use a CD/DVD CLEANING DISC. I USE ONE FROM MEMOREX. If that doesn't work try removing the top and do a thorough cleaning of the drive and optical mechanisms. Tighten any moving parts and lubricate the drive gear. Good luck!
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.