QNX4 - Photon - Screen Saver

Is there any function that allow you to manually start/stop the screen saver? We would like to activate the screen saver if we are not receiving data for a period of 10min.

I’m looking to turn off the monitor and not using the screen saver program in /usr/photon/pdm/savers which could be mannually start/stop. We could also display a black background by changing the windows but it won’t have the same effect as turning the LCD off.

May be there is some source code available to turn off/on monitor?