Hi Fly Airbus A340 500 TFX/TFW 237pax seat review by AB #34415

All seats in economy have seat back screens, but had no function other than to display "thank you for choosing arik air", an airline that owned the plane until 2015 (3 years ago of this writing). No way to turn off the screen.
There is no window for row 16. It is directly over the center of the wing.