Question about Samsung LN-T4042H 40 in. LCD HDTV

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I have a Samsung flat panel television, model #LN-T4042H. When I turn the tv on, it sounds like it is turning itself off and on repeatedly for more than 5 minutes before I finally hear the beeps that indicate that it is on. Can you tell me what is causing this to happen?

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Take ur tv aparts.The power supply board is the board that ur power A/C power cord go into it.U know basic electronic.U have soldering iron,know soldering,and solders?Check all around the power supply board.Look all around the power supply board,check and see find any defective gases leakage capacitors.These dead capacitors alway have bulges or fuff up it top.Replaced these dead gases lekage capacitors will solved ur power problems.Or tries Websites like, to buy a whole refurbish power supply board for the replacement.

Posted on May 11, 2010


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There is a problem with the power supply in your TV. The regulator switch is causing teh clicking sound you hear. In order to fix it, you will need to replace the power supply. This is done by taking off the back cover of the TV, locating the power supply which is usually a yellow board that will have many high voltage capicators on it and replacing it with a new one.

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The power supply will sense if the set is 'drawing' too much current and switch itself off. This could be the case here. The power supply board may eventually go completely bad.

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