There are two external monitor ports available, but I can not get any output on the VGA or HDMI. I think I have to go into the bios to change to booting from external monitor, but can not see the bios ...

That pretty much says it all, all the white values on my screen look faintly rainbowish, like the northern lights. Is this the 4 year old Gateway monitor dying, or is it the video card (GF3). It seems ...