Problem using the DVI to Video adapter

I am using a MacBook Pro. I am using the DVI to Video cable to connect my MBP to the TV. It was working fine and I was watching movies and videos. Suddenly I am having problem and its not working.
I hooked up the DVI to Video adaptor on the PC side . Black and white signal which is blurred/blocked/and modes across the screen. I tried playing with refresh settings, resolutions, etc but nothing is happening
Even in the display I am not able to see the NTSC
settings anymore. When it was working before the display changes automatically once i connect the adapter. But now it refresh but the display is not changing. currenly my display is set to 1440 * 900.
any idea why the display is not working, is it a driver issue.

Have you played with the "Mirror Displays" option in the arrangement tab?

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