Left vertical lines on the screen mac book pro 15, left vertical lines on the screen mac book pro 15

i was working with my new mac book pro 15" and suddenly  several vertical lines on the left hand side of the screen appeared  after three hours without doing nothing

Hello CATASK8,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
About NVRAM and PRAM
http://support.apple.com/kb/HT1379
Has to do with screen resolution settings.
Best of luck,
Mario

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