I haven't looked much at the color ones, but if it's networkable get it on a network and poke around in its web-based management interface. On the mono lasers t

I haven't looked much at the color ones, but if it's networkable get it on a network and poke around in its web-based management interface. On the mono lasers there's a setting for "Toner out" behavior - the default is "stop" but you can change it to "continue".