No luck finding a discrete code for on/off with the Apex dvd players. However, I have a solution that at least, works for my theater. When DVD is selected from the main ccf, I send a "power on" code, followed by a "open/close" command. I then switch to a macro screen which asks "Is the DVD drawer open?". I present two buttons, yes/no. If they pick "no", I send the same commands again. If they pick "yes", I display a message "Get off your lazy butt and place a disc in the player! Press PROCEED after disc is loaded." When they press the "PROCEED" button, the drawer closes and it takes them to the DVD control ccf.

Hope this helps.