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The problem that I am having with my Emerson PL-P42W-10A plasma tv is that allof a sudden it would not turned on one morning. When you turn it on the tv clicks like it is coming on then you get three blinks of the power on light before it clicks of about 15 seconds later.

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  • hazlaw7 Mar 26, 2011

    Thank you for responding to my post. I have replaced the y sus. and y buffer boards because that was the diagnosis that I recieved from a TV service center in my area. After replacing the parts the tv did the exact same thing. When you turn it on it blinks 5 times then goes out then blinks twice right before it clicks off about 15 seconds later. I am thinking that I need to replace the power supply board and test it with the original y sus. and y buffer boards to see if that works. Then hopefully I can recoup some of the money spent on the two boards i tried already. Earlier I forgot to mention the first five blinks of the power light.

  • hazlaw7 Mar 26, 2011

    Yes the solution was helpful. Azraelsrl was very thorough in his answer and i will be recommending this site to others.



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3 blinks indicate that the power source is in protected mode because one of the components of the tv has failed and now acts as a short. The only way to know for sure which is the failed part is to open the tv and measure the voltages on the output lines from the power source - the one that is going to be close to 0 will point to the failed board.
Most likely it's the power board itself - one (or more) filtering capacitor has failed, a common problem in tv's of that age. But it might also be the Y-sus board - Emerson uses old Sony parts and they were notorious in that regard.

Posted on Mar 26, 2011

  • Azrael SRL Mar 26, 2011

    5 blinks indicate a completely different problem - the digital/main board is not operational. This can be caused either by the failure of the 5 volts output line from the power source (no voltage - no operating processor - dead tv) of the failure of the processor. In the last case the entire board will have to be replaced. Check the status of the 5v line.

  • Elshamo707
    Elshamo707 Dec 19, 2013

    I have a emerson pl-p42w-10a that wont turn on and it blinks 5 times can you tell me what part I need to replace?


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