LAST KNOWN GOOD CONFIGURATION
Which does not rely on System Restore.
After I sccessfully restored my Dimension B110, [80 Gb HD, 512 RAM, KOGi 15" LCD monitor, CD/DVD RW]. The only problem was the monitor's resolution defaulted to 640x 480 with 16 colors.
I tried Control Panel, Display properties, but only shows ?Default Monitor? others are blanked out. Many help screens later, I tried one other possible suggestion: Display properties, Advanced, Troubleshoot, Hardware Acceleration, and I moved the level of acceleration/ performance ALL THE WAY TO THE LEFT "NONE" and restarted the system. After the restart, the monitor screen just went blank. It's been blank since, even if I tried reboot to  a safe mode (unfortunately I did not create a Windows restore point before I did all these); connected another LCD high res monitor (ViewSonic 17"), and rebooted using the Dell reinstallation operating CD Rom on the C Drive.
I appreciate anyone's help.
Tried to reboot, F2 (Set up),but nothing. After reboot, few seconds of Microsoft Windows screen, then blank screen. Used another high resolution LCD monitor, but still blank screen after reboot.