Since the other threads don't seem to get much attention, I'm reiterating the problem: any PMS release after 1.1.4 doesn't have a working DLNA service for Sony systems. It also seems to affect LG systems.
Threads:
- https://forums.plex.tv/discussion/243824/sony-bravia-kdl-40ex520-there-are-no-items-to-display#latest
- https://forums.plex.tv/discussion/245707/sony-bravia-not-displaying-mkv-files-anymore#latest
- http://forums.plex.tv/discussion/247723/dlna-since-version-1-1-4-2757-does-not-work-at-all-on-sony-blueray-player
- https://forums.plex.tv/discussion/240731/sony-bravia-2011-file-mkv-aac-audio-not-working#latest
- https://forums.plex.tv/discussion/235362/no-file-after-latest-update#latest
- https://forums.plex.tv/discussion/232415/dlna-no-longer-working-on-transcode-or-direct-play#latest
I'm betting there are more, this is just going back through few pages. All of those reported issues affect releases after 1.1.4.