Who knows? I have also seen the monitor used during games that weren't on TV, they use the camera footage from behind the goal and a camera on each side of center court. Not sure why it wasn't there. If Arrow is so upset present a case to the NCAA and make it mandatory for all NCAA D-1 games to have functioning courtside monitors for review. Imagine the outrage had the refs not counted it. I agree that they should have been there but they weren't and after Coach Arrow had seen the still on the screen which was on the screen for about 1 minute and in video you can see Coach Arrow did see the still camera shot. I think he was more upset because his boys hit a desperation shot with 2.4 seconds and they thought it was over.
FYI: He made it in time, they showed a still frame on the jumbo tron after the game that showed he clearly released the ball with .1 on the clock.