Sony BDP-S560 does not play Universal Blus

[Kaleu]

I own this player since about 2 years now, and I never had any problems with it until a couple of weeks ago. It does not seem to load Universal discs anymore, even though it did so before. At first it helped to take out the external memory stick during the loading process, but even that does not work anymore. The player does recognize the name of the movie, though; it just never manages to move beyond the short Universal loading logo.

All updates have been downloaded, so the player is up to date.

Does anyone know how to solve this?