MacBook Pro internet connection failure.

I have a 13" MacBook Pro with Lion and I connect it to Internet through WiFi. But in order to watch contents on a bigger screen I use to connect it to the TV as well via MiniDisplay Port-HDMI. But as soon as I connect it to the TV, the Internet connection is disrupted. If I disconnect it from the TV´s HDMI, the internet connection works as normally. What can be the cause?

Hi there jse1026,
You may find the troubleshooting steps in the article below helpful.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
-Griff W. 

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