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55HDS52 no picture no sound. no startup voltage on vsago and vcego connector on connector CN68 power supply and logic board was replaced and still no voltage. what create the 3.15 voltage on pin 2 and 3 for cn68 connector.

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55HDS52 no picture no sound. no startup voltage on vsago and vcego connector on connector CN68 power supply and logic board was replaced and still no voltage. what create the 3.15 voltage on pin 2 and 3 for cn68 connector.

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