Question about Toshiba 32A33 32" TV

2 Answers

My Toshiba 49L621U (TV)will not turn on it just flashes logo then promptly turns off

Bill forgets this is computer forum it posts a TV. so answers below will be wrong, dang even hyjacked. edited by tech.

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  • Rick Hurd
    Rick Hurd Feb 14, 2019

    SOLVED - Be careful, as there are dangerous voltages inside the TV and only an experienced technician should attempt the following solution:
    On Toshiba LED TV's, this can happen when the brightness is turned up on the backlight and/or dynamic picture mode is used. You should use STANDARD picture mode and never turn the backlight up above 60.

    To get the screen to stay on long enough to make these changes, you can try the following temporary fix:

    There is a 15-16 pin connector wire between the power pcb and the main pcb. On the power board, there should be a label that indicates which pins are "DIM" and "BLON" (on my 49L621U, these were pins 13 & 15.) Run a jumper wire between these two pins. This should prevent the voltage from dropping in order to keep the screen LEDs on so that you can access the menus.

    Be careful and GOOD LUCK!

  • Jack Scarpon
    Jack Scarpon Mar 25, 2019




2 Answers

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  • Toshiba Master
  • 54,386 Answers

The power supply could be failing

Posted on Apr 15, 2018

  • 1 more comment 
  • Rick Hurd
    Rick Hurd Dec 18, 2018

    I have had the same issue. I replaced the power supply AND the main board and checked all the LEDs. It still shuts off after 5 seconds of showing the logo.

  • Larry Ng
    Larry Ng Dec 19, 2018

    rick are you posting about A TV like the OP bill posted? yes,/no.?
    49" inches TV it is.(was)

    you never told what PC you have. if a PC.
    nor post your own TV post on the TV forum.?
    did you get the service manual on this TV.
    and see that?
    what back lighting does your TV have.
    some are not LED. (age matters)
    some have short lived lamps. (ccfl or halogen)
    the clue is watts if high on TV it is halogen.
    Bills TV (op) is and LED back lamped TV.
    the tv has 5 boards inside, 3 are main.
    main big
    and data board.
    one is bad if not the LCD panel it self.

  • Rick Hurd
    Rick Hurd Feb 14, 2019

    I followed the posted question. if it was in the wrong place, then that is for the moderator to fix, not me. Also, I just said that I checked the LED's, so obviously it is an LED tv. The forum thread is not listed with the question on this system, you search for a model number and it pops-up. There is no "TV" or "Computer" forum title shown anywhere on the page.



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  • Contributor
  • 31 Answers

You battery must have a problem try to remove batterry and plug the power supply .or maybe its your hardisk failure your hardisk must be corrupted something like that

Posted on Dec 19, 2018

  • 1 more comment 
  • Larry Ng
    Larry Ng Dec 19, 2018

    yah bill posted TVs to computers, so, yah.
    no battery in the TV.

  • Larry Ng
    Larry Ng Dec 19, 2018

    i moved you to TVs out of computers.

  • Larry Ng
    Larry Ng Dec 19, 2018

    Fixha has no Toshiba index for 100s of models
    this is the only one. wrong for model right for TV



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