I have my macbook pro hooked up to my LG flatscreen tv using a rocketfish mini displayport to hdmi adapter. It works great, sound and picture except one thing. The tv screen keeps flashing black. My computer screen stays normal. It flashes about every 10 minutes and the longer i play something, like a movie it starts flashing every 2 or 3 minutes. The black screen lasts about 2 seconds each time. I can still hear the sound though. What should i do?
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