[T3OU-736]

Panasonic, back in the plasma days, used to have a "professional" line. Those were plasma monitors (no built-in tuner, no sound processing at all), and it had modular inputs. There are 3 slots for I/O cards. Can still find the cards on ebay under the "Panasonic HDMI TV Boards" search results.

[jankiehodgpodge]

Sounds like a digital signage screen. I have a few Samsung digital signage displays from 10 years ago that still work perfectly. Amazing picture even by today's standards and very thin.