Could be that your monitor cable is disconnected from the back of the server. Make sure all your cables are connected properly. Check for bent pins on the Video cable. Also could be a bad video card, you can check this by checking out the monitor that is attached to the server currently, connect a good working system or laptop to the cable and see if you get video, if you do then you probably have a bad video card. Don't know but do you get the first initial dos or BIOS screen before it goes into Windows? If you do it maybe a Frequency setting in the adapter driver. To change it boot up into VGA mode and change the setting to a lower one (this one usually tells you that the scan value is out of range).
david e
*end users are just like computers, some you can work with...others just need a simple reBOOTing to fix their problems.*