Screen turns green with external monitor

Hi,
When im watching a movie from my Macbook Pro on an external Philips TV (HDMI), then my screen turns green after a couple of minutes (variable from 5-15 minutes). After opening and closing my laptop it turns normal again, but after that it happens all over again.
Who can help me?
Thank you!

Hi royvd10,
Thanks for visiting Apple Support Communities.
If you're seeing unexpected behavior with video on your external display, start with the troubleshooting steps in this article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Best Regards,
Jeremy

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Screen turns green with external monitor

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