Macbook backlight behaving strangely

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so, macbook 2008 model , backlight has gone crazy. works fine, can boot machine there no problem. machine starts boot backlight might shut off during loading or after while when in os. picture can seen faintly. if shut display lid , open (atleast now) comes back.

cable gone bad? similar experiences?

after noticed put macbook aside , switched pc laptop still works (also 2008).
thought maybe should check mb , try fix it.
 



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