I have a backup computer that I rebuilt out of old and new parts. My problem is with the monitor. The computer boots up just fine, monitor works, and everything, and shuts down properly, too. However, when I install a new program or make some kind of change that requires me to reboot, the computer reboots, but the monitor remains black. This also happens if I go into BIOS at boot time to make changes. After I have made and saved the changes, the computer boots (I'm pretty sure it does, anyway), but the monitor remains black. This happens during the WinXP installation when reboots are required, also. The monitor is at least twelve years old, but still works well. It is one of the early Energy Star compliant monitors (CRT, of course), a 17 inch (you wouldn't believe what it cost in 1994, at which time it drew a lot of admiration from all who saw it). The name on the monitor is Elite. The motherboard is a Mach Speed V2DP, powered by an AMD 2400+ Sempron. Memory is 512 MB of PC 2700. I have been told that it may be power scheme issues, although I don't see any changes that I could make in Power Options that would do anything. Any help would be appreciated.