That looks like the PC is not set to the display (TV) settings. Here's a note for Windows 7 settings.
Bob
-> http://windows.microsoft.com/en-us/windows7/help/videos/changing-windows-settings#tab=newto
i recently unplugged my vga cable from my computer and when i put it back its not displaying fully..
The display comes in a middle of a black screen..
https://www.flickr.com/photos/69604209@N03/15660587909/

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