Problem after lifting lid on Mac.

i have macbook pro 15 inch mid 2010 i7. on lion , having problems mac. when close lid , later lift again (note: lift instantly test or after couple ours.) see screen works 5 seconds when screen fades black. fix turn down brightness 1 bar , turn up. after turning down 1 bar screen instantly comes up. if dont click mouse trackpad nothing responds until click brightness keys down or (if set max brightness already.)

please annoying change brightness after every time close labtop.

thanks!

 

dirty light sensor on top of screen next webcam?

 

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