Why does my LCD TV show a black screen for 30 minutes when first turned on?

Jundee Layne September 18, 2011
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I have a Sony LCD 47 inch TV, model #KDL-46S4100. It shows a black screen for about 30 plus minutes when first turn it on. Is there a bad card in it that can be replaced? If so, where can I buy one? Thanks

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