Sounds like you already have a "solution"

But "no red color" (or others) usually means a bad pin on the card/cable/monitor. Check for bent pins.

I typically run DVI to a LCD flatscreen, so I avoid analog connections if at all possible.

Taxman

"Any group is weaker than a man alone unless they are perfectly trained to work together."
- Robert A. Heinlein, Starship Troopers