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Tv wouldn't turn on this morning after the night. Amber light blinks three times, pauses, and repeats. I've checked the capacitors for bulging or any sign of loose wires and/or signs of a shortage. My tv is a 37LX96. I've heard it's a common problem for these to have the main video board go out but i'm not sure what would be my best course of action or if that's even an accurate guess. Thanks for the help

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  • johnsonsr324 Mar 22, 2011

    I'm not too television savvy so could you help me locate where the connector is that I have to measure? Also, if it is indeed your solution, where would I go about getting the parts needed for repair and how would I install them? And if it is the video board, where do I get one of those? Sorry for the plethora of questions I'm just not too familiar with board level components of televisions.



    thanks again

  • johnsonsr324 Mar 23, 2011

    I don't have the money to have somebody else diagnose the problem for me and pay for a new power board, so I have one last question, how do i go about measuring the voltage now that i've located the P809B connector, i have a decent idea how to do it, but like you said if i mess it up i could screw the whole tv up.

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My answer for your best course of action so as to not throw good money after bad is to at least get a tech to look at it, give you a diagnoses and then we can procede from there. They will give you an estimate on part prices as well as what it will cost to fix. You can then decide if you want to spend that money on a repair or a new set. If you wish to repair the set yourself with parts you buy yourself with my help I can do that. But I don't want you or me guessing with your money. There are a multitude of issues that can cause things like this from bad power cords to switches to boards, the flashing light tells me that it is at least seeing a problem but unable to get enough voltage to power up. Is this a Toshiba? I am guessing by the numbers. This manufacture has had problems with the T con board, it sets directly over the power supply and heat kills it. Great design.
But I can't tell you from here which board it may be with out getting my hands on it. Anyone else who says they can are feeding you some junk and they just get lucky now and then but you have to pay for their mistakes. I don't want to do that, so If your wanting someone to nail it on the first shot and get your set going without ever seeing it. Then I can't help. But if you can narrow it down for me I can help a great deal. Thanks

Posted on Mar 23, 2011

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Yes, the video board on these isn't very reliable, but most likely this isn't your case: 3 blinks indicate a failure in the power source - either one of the rectifiers or one of the filtering capacitors have shorted.
To confirm that measure the voltages on the P809B connector - if the 5v-1 and Power ones are below 5 you will know for sure.

Posted on Mar 22, 2011

  • Azrael SRL Mar 22, 2011

    The connector is situated on the power board, clearly labeled: each pin has its correct value printed next to it. In the picture from the link below it's situated on the right, just aboce the yellow transformer.



    The board is easy to replace: you just disconnect the cable connectors and unscrew its fixings. You can get a replacement from here
    http://www.partstore.com/Part/Toshiba/To...
    But, since diagnosing a switching power supply is a complicated job and you lack even the basic experience, i strongly recommend that you call a pro - if you touch something you shouldn't by accident you can fry the entire tv. If you still want to do it yourself then be extremely careful.

  • Azrael SRL Mar 23, 2011

    Use a good voltmetre - with fine control probes, detach the board from the tv but leave it connected, flip it and support it with some insulating posts as to have an easy access to the points, attach the ground probe securely and touch the point that you want to test only after you have identified with precision - do not touch anything else. A basic tutorial on how to diagnose it can be found here
    http://www.repairfaq.org/REPAIR/F_smpsfa...

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