Are you dealing with a LCD monitor? If so, it may be helpful to kick
your console into framebuffer mode running at the native resolution
for your monitor. See http://tldp.org/HOWTO/Framebuffer-HOWTO-5.html

I had a KVM monitor that would display nothing and go to sleep when I
switched over to my Linux servers until I set the framebuffer to the
monitor's native resolution. Was rather annoying as the KVM would also
get stuck on that channel and refused to switch to another one... :)

-- 
Andrew S. Zbikowski | http://andy.zibnet.us
IT Outhouse Blog Thing | http://www.itouthouse.com