How can i connect my computer and tv?

i wanna connect my computer and tv, and i also want to divide it. like i could do something on my computer and at the same time i wanna watch a movie on tv ,which actually computer is playing. watching a security camera

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I*f your computer presently has a TV output, usually an S connector, you should be able to connect that to your TV and go into display property settings to set-up the TV. If you don'tb have any TV output, then you will need a video board in your computer with multiple outputs. This is common in middle of the road video boards in the $100 range. Typically, these boards will have two DVI/VGA outputs and a TV output with a connector going to a dongle with component and S outputs. Using the driver that comes with the board, you typically can spread your desktop across two monitors (one can be the TV), put the same thing on both monitors, or put different things on the two monitors.

Two prime sources for these boards are NVidia and ATI. Look at the NVidia 7600 series boards.

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You'll need a VGA cable to connect the computer to the TV. Then if you want to have 2 things going you'll need to use PIP to split the screen into multiple views. If you're using your TV as a monitor then you're going to also need a Bluetooth keyboard so you can sit a few feet away from the TV because the Infrared ones won't reach far nor will you find a keyboard with a 12 ft. cable for example.
Go to www.techcctv.com or give them a call they can help.
you have to buy a special cable
Slingbox will do much of what you want. The product is great, but their attempt @ humor is lame.