Nope, i have a unit that will display a PC display on your TV, it has loads of ports and things, it came with a scart to VGA. So i tryed sending a picture down the scart into the input, where you would usally conect your graphics card to (with a small cable supplied) and connected a normall monitor to it. (it has 5 outputs on it, S-video, composite, scart, monitor 1, monitor 2). The monitor switched on but no picture was displayed.
I had a closer look at the cables and on the monitor cable it had 1 pin misisng, but on the scart to VGA it had the pin.