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I have a lcd toshiba 37RV753 , when i turn on the screen comes for 2 sec. then the green standby light goes flashing yellow , what could be the problem and how to fix it ?? Thanks

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  • 14 more comments 
  • RUI MOREIRA
    RUI MOREIRA Nov 13, 2010

    Hi, the light keeps flashing with no pause .

  • RUI MOREIRA
    RUI MOREIRA Nov 15, 2010

    Hello, sorry only now, but weekend :)
    yes i have knolledge about electronics, can you help me ??

  • RUI MOREIRA
    RUI MOREIRA Nov 15, 2010

    I have a lcd toshiba 37RV753 , when i turn on the screen comes for 2 sec. then the green standby light goes flashing yellow , what could be the problem and how to fix it ?? Thanks

  • RUI MOREIRA
    RUI MOREIRA Nov 15, 2010

    not when turns off , but when i turn on the led on the front is red, then i put on , the screen appears for 2sec. then the led gets yellow and flashing without pause.

  • RUI MOREIRA
    RUI MOREIRA Nov 15, 2010

    the power supply is faulty ! can i repair it, because i have some experience in electronics

  • RUI MOREIRA
    RUI MOREIRA Nov 15, 2010

    Ok thanks, just to confirm is the power board i need to replace ( dps-145-pp-131 ) ??

  • RUI MOREIRA
    RUI MOREIRA Nov 15, 2010

    Thanks you are the man :) !!!

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    Hello, i bought and replace the power supply , but the problem still what can i do now :( ??

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    please tell me something about this .
    Thanks

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    i bought the power supply but still the same problem

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    everything is like was before and i already spend in an new power supply, i compare both, all the components are ok :(

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    no improves, is like the other one , i compare components with both power supplys they are the same , so the power supply is not faulty :(:(

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    No, the only that flash is the led on the front (flashing yellow) on the back the green one on the main board is still

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    i think is the inverter because i disconnect the inverter and the same result (led flashing) can you advise here to find the inverter ??

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    what do you advise now ?

  • RUI MOREIRA
    RUI MOREIRA Nov 17, 2010

    yes please try to find me the part ?
    thanks

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  • Master
  • 4,889 Answers

The tv is turning off due to somekind of protection fault. Can you tell me how many times the yellow light flashes in between each pause?

Posted on Nov 13, 2010

  • 8 more comments 
  • eagle338
    eagle338 Nov 13, 2010

    There are a lot of things that can cause this problem on an LCD the most common being, faulty protection circuits on a power supply, overload due to plagued capacitors and last but not least faulty balancer circuits due to one of the CFL backlights inside the panel malfunctioning. We are gonna have to do component level diagnosis to determine the source of the problem, which begs the question - Do you have experience working on electronic circuits before? Do you know how to work with a multimeter and how to solder? If yes then let me know and I will see you through this. Otherwise please get me your zipcode so that I can get you a list of techs in your area.

  • eagle338
    eagle338 Nov 15, 2010

    When it turns off, the LED at the front blinks right? How many times does it blink in between each pause?

  • eagle338
    eagle338 Nov 15, 2010

    Ok. That confirms it. Faulty inverter voltage from the power supply seems to be the cause. I can find you one online for about 75-100$ if you want to do it yourself.

  • eagle338
    eagle338 Nov 15, 2010

    Not this one. The pins from which the voltage goes to the inverter, are attached to a solid state component. It is irreplaceable. Replacing the board is the only solution.

  • eagle338
    eagle338 Nov 15, 2010

    Yes that is it. Make sure that the entire part number matches with the one in our set.
    http://cgi.ebay.ie/PSU-TOSHIBA-32-TV-32R...

  • eagle338
    eagle338 Nov 17, 2010

    No improvement at all?Like the power light staying green instead of clicking or something?

  • eagle338
    eagle338 Nov 17, 2010

    Please take off the back cover of the tv, and see if the LEDs on any of the boards flash. Its a self-diagnostic function that can possibly detect the cause of the failure. Try it and let me know

  • eagle338
    eagle338 Nov 17, 2010

    The inverter? If the inverter is disconnected, it won't even attempt to start and the LED just blinks. However if you insist, I can find you the part

  • eagle338
    eagle338 Nov 18, 2010

    The one in the first two images(20i and 19m) looks like the main SSB. What is the part number? 5.27 B5 is not the part number. What other numbers do you see on the board?

  • eagle338
    eagle338 Nov 20, 2010

    Ok. If you just get me the part number off the inverter board, I will be glad to find you a replacement. Do you know what it looks like?

×

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