On the VS2480 check to make sure VGA is configured properly:

1. Press UTILITY.
2. Press PAGE—if necessary—until SYSTEM appears above F1.
3. Press F1 (SYSTEM).
4. Press F2 (Param2).
5. Press "up," "down," "left," or "right" arrows to select various parameters:
- VGA OUT = should be ON
- REFRESH RATE = try various settings, the highest your screen can use will normally work the best.