That is what is known as a TAB fault ('''T'''ape '''A'''utomated '''B'''onding) and is caused by a connection failure from the TAB that connects the transparent electrode layers to the video driver board of an LCD.
You will need to replace the LCD/whole display.
If you give us the last 3 characters of your serial number we can help you with a guide/instructions for the procedure and point you to the proper part.
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[http://www.ifixit.com/Guide/Installing-MacBook-Pro-13-Inch-Unibody-Mid-2009-LCD/1423/1|Here is a guide] on the LCD replacement procedure. I suggest going through it to see if this is something you can do yourself. [http://www.ifixit.com/Mac-Parts/MacBook-Pro-13%22-Unibody-Mid-2009#0-LCDs|Here are the parts] being offered by ifixit. One of the parts is the LCD only and would be the most difficult to replace, but cheaper in price. The other is the entire upper half of the laptop. It cost more but is a much easier way to do the repair yourself.
That is what is known as a TAB fault ('''T'''ape '''A'''utomated '''B'''onding) and is caused by a connection failure from the TAB that connects the transparent electrode layers to the video driver board of an LCD.
You will need to replace the LCD/whole display.
If you give us the last 3 characters of your serial number we can help you with a guide/instructions for the procedure and point you to the proper part.