Hi everyone. Nothing has changed on my system for months. This issue started a few weeks ago. I am running WinXP Home and when you select the option to switch users and select the user to swtich to, the machine will begin to load and show the desktop but then the screen goes black. This is the only time it happenes. If you turn off/on the monitor again it will get rid of the black screen. While the screen is black the monitor shows a green light and does not go into hibernation. Anyone experience this before?