Factoring in the TV as a monitor could be part of the issue. Do you have a standard LCD computer monitor around to try out? Sometimes when you go from Windows into a game the screen will temporarily blank to black as the display switches from 2D to 3D operation, and from windowed to full screen. So you could have an issue with the TV. Have you tried just turning the TV off, and then back on? Instead of removing the VGA cable? If that works, it might at least let you narrow things down to a TV/Monitor issue.