Banded colors and lines on the LCD Display

I have a first generation MacBook Pro with an Intel Core Processor. The display has started to fail and will only render the image on one half of the display while the other half of the display is a solid band of white light. Squeezing the display housing on the left hand side will force the display to snap back into shape and render the full screen correctly. Releasing the bevel causes the screen to go half and half again. The computer hasn't had any physical damage done to it such as dropping or liquid spills. IT will push video to an external display and work fine so I know the issue is in the Display panel somewhere. What is the best quess on what part is failing and what I would need to purchase in order to repair the ailing machine.