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Our Sony Bravia kdl-40W3000 turns on very briefly and then shuts off, and there are no blinking lights. Does this tell me anything?

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Does the LED atleast stay in standby mode after it shuts off or does it go off altogether. It sure sounds like a protection fault causing the relays to power off the set but I would like to get as much info as you can give me to zero in on the source of the problem.

Posted on May 29, 2011

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  • mmckitri May 29, 2011

    I press the power button on the remote, there's a click, the green LED comes on, after a few seconds the red LED comes on (and it might flicker a bit, but it doesn't flash); the picture comes on briefly (and I hear a slight buzzing sound) and then the TV goes off and both LED lights go out completely. It's not in standby mode. And after doing it a few times I smell a smell like a hot component. So something is drawing excessive current. Thanks so much - Mary

  • eagle338
    eagle338 May 29, 2011

    Indeed. There is only one way to figure this out since there is no blinking. We should start with the 5V line of the power supply board as there is no standby light. Do you know how to use a multimeter?

  • mmckitri May 29, 2011

    yes am taking the back off now - thanks so much for your help. Will report back shortly.

  • mmckitri May 29, 2011

    Taking the back off was tricksier than anticipated. So, there was arcing in the high voltage area. Wires between the LED panel and the high voltage area passed over a connector - don't know if it was the connector blades that weakened the wires, or if there's something on the other side of that connector that is a problem - don't have a schematic. Going to repair the wires and see if that fixes the problem. Many thanks - Mary

  • eagle338
    eagle338 May 29, 2011

    The arcing suggests that either the backlight inverter is faulty or the load balancer circuit of the panel is faulty. Let me know whats the status after you fix the connectors.

  • mmckitri May 29, 2011

    It was arcing because the wires were severed. I think what's faulty is the design. Anyway, the wires are spliced and soldered and the TV works, so we'll call it good for now!

  • eagle338
    eagle338 May 29, 2011

    Glad to hear that!

  • Orlando Gomez Jul 13, 2011

    Hey, I have the same problem. I noticed that the standby LED is always blinking eight times. I bought that LCD as an "Open Box Sale" in Sears (McAllen, TX) 3 years ago, but I didn't use it so frequently.



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Sony bravia 46 shutting off a blinking 6 times

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Goes on for about 6 seconds and shuts off goes into stand by

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