display power

[abc at ai1.anchorage.mtaonline.net]

can someone tell me how to stop FreeBSD (4.11) from
turning off my monitor (after whatever preset timeout
there is)?

it's messing my monitor up because it takes my monitor
about an hour to stabilize the display after being
turned off - and i can't afford a new monitor right now.
until it is "warmed up", it squiggles all over to the
point where nothing can be seen or read on the display.

thanks