Any harm to the monitor in using SendMessage Function

Question

I developed a little app which uses SendMessage function to turn off monitor. My friend asked me whether using the app regularly will harm his monitor. He had some issues with his mother board when he used a similar app. Is there any harm (for hardware) in using the function to do things like these?

Answer 1

Not unless the monitor is faulty.

That said, turning it on and off very fast might stress it eventually. I'd consider enforcing a minimum of a couple of seconds between each turn on.