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snaky69

macrumors 603
Mar 14, 2008
5,908
488
You probably have a failed nVidia 8600GT, if the MBP is 4 years old or less, apple should replace the entire logic board for free, these are known to be defective and there is a service bulletin out for them.
 

blueroom

macrumors 603
Feb 15, 2009
6,381
26
Toronto, Canada
Could be the LCD panel showing its age, could be a connector coming loose. You could try the iFixit site but unless you're handy with such stuff you may do more damage than good.
 
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