Question about Vizio SV420XV 42 in. LCD TV

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Tv is on, screen is black. Sound is working. Channels won't change. Tv will not turn off.

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Tuner/decorder is gone out you would need to purchase a new decorder board for this. Try hooking up something on the scart connections and diagnost the tuner but if it does not change channels and its not turning off you got a problem with the decoder/tuner board.


this would cost around $250 for the replacment.

Posted on Jul 19, 2009

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