my tv was connected now i cant connect to internet
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Something must have been altered -- did you do anything before you noticed the Internet was inaccessible? Firmware updates? Start over and reset your TV Internet connection settings to your gateway router according to your manual.
Check the router for Wi-Fi to see if it's working or not. And you could try updating your firmware. I had a little problem with my LG LW5600 one time but it was all good after updating the firmware.