I have a macbook pro 10.6.8. The screen displays vertical grey lines how do i fix it?

I have a macbook pro 10.6.8. The screen displays vertical grey lines. I tried Crtl.command.eject... Did not work. I tried Command.crtl.p.r. way; Didnt work. What is wrong with my mac and how can i fix it?

NVRAM reset is command, option, P and R.
Restart the computer and immediately hold the four keys down. Keep holding the keys down, and let the Mac chime three times, then release the keys. Be patient it could take some time.
That being said what you describe may be a hardware issue, so the NVRAM reset probably won't work.
You can get a free diagnosis at an Apple genius bar. Make an appointment and take the MBP in,
http://www.apple.com/retail/geniusbar/

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