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crwdns2934241:0crwdne2934241:0 Bunngoun An

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I Just found a solution about this problem....

Open the back case of your macbook

Just push the VGA or Monitor cable down a little bit hard...(no need to unplug)

[http://forums.macrumors.com/attachment.php?attachmentid=415207&d=1370390860]

It work for me as well...try it! ;)

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open