OK, the issue is that the monitor is telling FC4 that it CAN do 800x600; but when you try to enter 800x600 it the monitor displays an error (very faint) that is can ONLY do 1280x1024 at 60Hz.
The FC4 ATI Radeon drivers work -- it is the Dell LCD monitor that is being incorrectly detected.
The DDC auto-detection is seeing that the LCD *is* able to run at 800x600 but the monitor refuses to actually enter any mode.
What can I change or install to correct? Thx/Bill