Question about LG 42LC2D 42 in. LCD HDTV

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Every time I turn my LG television to the TNT channel while the NBA is on, it immediately turns the TV off, and then it comes back on, the off and so on until I turn the channel. This only happens with the TNT channel while NBA is on, TNT will work fine when a different show is on. Does anyone know how I can fix this?

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