Problem with monitor when logging off
On my computer (I'm running Windows XP) There are 3 user accounts: me, my mom, and my dad. Whenever I log off my dad or my mom's account so that it won't slow me down when I go on mine, the screen blacks out and a window appears that says: No Signal. Then the green light on the side of the monitor that indicates that it is on, turns orange. Usually it only turns orange when I shut down the computer and leave the monitor on. And I've tried turning the monitor off and on a couple times, but that didn't do anything, so I'm forced to manually shut down and start up the computer.
What is going on here and what can/should I do to fix this?