Bravia won't display PC signal anymore

[Enmarcador]

I have my computer's Nvidia 6800 Ultra video card connected to my desktop lcd and my HDTV. It's been great to sit on the couch and surf the net on my Sony Kdl-v40xbr1. Last week, I reformatted my computer, and now I have no picture on the tv. The Bravia is set to video 7 input for pc, but says "no signal" on the screen. I hooked up another monitor to the same cable and it works fine, so I know the signal is making it to the tv. All the cabling is connected correctly. I've tried different video driver versions, but nothing. Any ideas what could be the problem? I'm stumped.

 

[Trevorm7]

Are you using a dvi to hdmi cable or component? Also make sure it's setup right in the nvidia control panel.