Originally Posted by wojtekmk2
ISOs that played before now don't play at all, the player hangs the moment I select an ISO file, both via USB and eSATA.
Have you checked the drive for readability on a PC, including confirming you can actually play the ISO files on a different device to make sure the file contents haven't been corrupted?
If this checks out okay, try writing an ISO to a drive as folder/file structure instead of ISO and see if that plays. ISO is not really required as the Oppo 93 will happily play folder/file structure (even 3D).
For 3D, folder/file structure will be twice as large as the ISO, however you can delete the 2D files (usually a large 30GB+ file and a 15GB+ file) and 3D will still play just fine (not sure about 2D though). However, don't delete the other 2D files as I think the player still uses some of those for initial navigation. You will end up with a structure that is a little larger than an ISO but smaller than 2x ISO.
If folder/file structure plays okay, consider updating the firmware to close to the latest firmware, as there have been improvements to mkv playback and other things, and converting all ISOs to folder/file structure.
Are your ISOs Fox titles by any chance? Some have found their Fox Blurays will no longer play. I haven't had any experience with this thankfully, but you could try converting a Fox title to AnyDVD SpeedMenu version to see if that helps, or create a movie-only Bluray structure. Worst case is you may need to convert unplayable titles to mkv files for movie and extras (makemkv is still very good for that), however the Oppo 93 won't play Bluray subtitles in an mkv IIRC.