is there a utility to tell if the monitor is on or off in CentOS?

[geisj at pagestation.com (Jerry Geis)]

Is am trying to find a utility to tell me if the monitor is physically  
on or off?

DPMS is turn off so the monitor will not be automatically turning off - 
I just need
to know if someone has turned off the monitor in an automated way?

I thought the VESA standard would have something like that but I have 
not found
it.

Does anyone know a way to do this?

Thanks.

Jerry