I really hope someone can help me with this. My monitor is displaying a no signal message at startup, not even showing the windows boot screen. However, I plugged the cable into the on board graphics card and it works fine, it's only when I try it on my other card that there's a problem. I've cleaned and reseated the card, but no joy. This is a completely out of the blue problem. It was working fine last night, tried to turn it on this morning, and this happened. Any advice? Or do I just have to get a new graphics card? Thanks for any help you can give.