on a monitor

At first, all I could see on the monitor was black.

He did not have time to watch the first game on the monitor at his feet.

Something was coming through on the monitor he didn't understand.

Then I went to the front door and let myself appear on the outside monitor.

And then, on the third monitor, he could see inside a room.

The room had only one door, and that was on the monitor.

Something was being shown on the monitor to his left.

Four - the same number he had seen on the monitor.

Finally, she moved into the control room to watch the scene on the monitor.

Our baby was absolutely fine and happy on the monitor.