I know the setup is a little different, but it has worked for me for about 2 years, in two different locations. I've had no problems using my desktop on my Samsung. But recently, I purchased an LED tv.
So in my living room I have two big screen tvs. Side by side. And sometimes, I'll take the HDMI (that connects to my pc) from one tv and plug it into the other tv, for different reasons. And this is usually fine... But today, I took it out of my LED and plugged it into my Plasma and now I'm getting no signal. I checked everything... Each cable seems fine and is plugged in correctly to each adapter. The Mini-hdmi is plugged in correctly to the video card. I've went through my display settings/Nvidia Control Panel, and the computer acknowledges the tv. I can turn the "second display" on and off, but nothing happens. When I turn the 2nd display off, my TV reads "No Signal" but if I turn the 2nd display on, the TV immediately changes to "Searching for Signal". So I know something is going on. I've went through Nvidia 3d settings and made sure "multiple displays" is allowed. I've scoured the internet for help, but to no avail. I've tried unplugging everything, reconnecting, updating video drivers, powered on, powered off everything... I'm about to throw my computer out the window. Could someone please help me?