Stop console going blank (if it is)

I've just asked someone to plug in a monitor and send me a photo of the 
screen. "It's blank".

Horrible memories of "screen savers" being added to later versions of 
FreeBSD.

I can't actually tell if this is the case here - how can you make 100% 
sure the video output never gets turned off?

I'm seeing the following during a boot: "kernel:  blanktime." and 
getting paranoid.

"sysrc saver" returns "saver: NO"

Thanks, Frank.