- 1. What inputs does your TV or projector have?
a) Composite
b) Svideo
c) Component
d) DVI – this link usually sends only video but is capable of sending audio if used with an HDMI cable/converter from the source side to an HDMI input.
2. What outputs does your computer's video card have?
a) Composite
b) Svideo
c) Component
d) DVI – Sometimes common more-so in projectors, this link usually sends only video but is capable of sending audio if used with a HDMI cable/converter from the source side to an HDMI input.
3. Connecting the video card to the TV or projector.
a) Composite to composite
b) Svideo to Svideo
c) Component to component
d) DVI to DVI
e) DVI to HDMI (with HDMI adapter on the computer's DVI interface)
I am using a Nvidia Geforce 8800 GTS video card which can send video, using a supplied cable, as component video or using an adapter on the DVI interface, as HDMI.
First, ensure you have the latest settings for your video card by visiting Nvidia.
In your system tray in the bottom right of your screen, right click on the Nvidia icon. When you move your mouse over it there is a popup that says “NVIDIA Settings.” Left click the option for NVIDIA Control Panel.
On the left menu, left click Display top open the menu if it's not expanded already. Then left click “Run multiple display wizard.”
Left click “Next” then select how you are connecting to your 2nd screen. The computer should detect the video connection as long as you have your cables connected. In my case, I'm using component cables to connect to my projector. The computer detects the connection and marks it as component.

Left click “Next”and select the standard for your connection. Component will handle 1080i, but your TV or projector also has to support it. In my case, my projector can support up to 1080p so I select 1080i since that's the highest option available to me.
Now you select whether you want your main display to be cloned (use the exact same screen) that your TV will use or if you will have them configured separately.
If you use Clone, both screens must be the same resolution so if you are running 1680x1050 for example and your tv runs at 1768x992, both of them will run 1768x992 (1080i HDTV). If you select “Clone” and left click “Next”, everything is set up and you can click “Next” then “Finish.”
If you use Dualview however, you can keep your main screen at your higher resolution and create a custom resolution for your TV. If you select “Dualview” and left click “Next”, select the resolution that your primary screen should (or is currently) running at. Mine is running at 1680x1050 so I select that and left click “Next” twice and then click “Finish” to close the multiple display wizard.
Now, you should be set to use your 2nd screen. After the wizard runs, you will have your screens configured already in dualview mode with your primary screen on the left and your secondary screen (TV) on the right. What that means is in order to do stuff on your new TV screen, you move your mouse cursor off the right side of your main monitor and it will appear on your TV screen. You can move windows or applications from your main screen to the 2nd TV screen by clicking on the title bar and while holding down your left mouse button, drag the entire window or application over to the new screen. If you double click the title bar, it will maximize. This is especially handy if you use Netflix to watch online movies. Then you start your movie and click the full screen button on the Netflix movie viewer. What happens now is that the video will show on your new TV screen while the audio comes out of your computer speakers. That's because only HDMI transports audio along the same cable. You will need to run a separate audio cable to your TV in order to have the sound come out from it. Or if you use a sound system, you can run the audio to that. My motherboard has digital coax audio S/PDIF so I run that to my home theater system for 7.1 surround sound.
Now the other trick is that when you do NOT want to have the second screen active, you can disable it easily through the Nvidia system try icon. Left click the icon, select either video device, nView Display Settings, Single Display then select your primary monitor – the one not listed as HDTV probably.















