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lg tv 42lv450 does not start

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    #41
    Re: lg tv 42lv450 does not start

    When you replace the main board remove that resistor. There's a possibility that the main board during the resistor test went from bad to worse
    Did I leave the soldering iron on?

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      #42
      Re: lg tv 42lv450 does not start

      Also did you make sure that you put the Wire back in its socket for DRV-ON connector?

      Yes he bypassed the power on forcing it on however now you get no LG logo or backlights. Before it would display logo and then shut off but now got worse. You can try heating up the main board with a hairdryer and see if it comes on
      Last edited by freakaftr8; 12-30-2017, 05:12 PM.
      Did I leave the soldering iron on?

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        #43
        Re: lg tv 42lv450 does not start

        I put everything as it was, so if I buy a new motherboard it should work the tv? does the power supply card work?

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          #44
          Re: lg tv 42lv450 does not start

          The power supply appears to be operating so far.
          Did I leave the soldering iron on?

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            #45
            Re: lg tv 42lv450 does not start

            Reflow bga?
            Attached Files

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              #46
              Re: lg tv 42lv450 does not start

              You could try before ordering a new board
              Did I leave the soldering iron on?

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                #47
                Re: lg tv 42lv450 does not start

                do i have to remove the power on from 3.5? after reflow?

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                  #48
                  Re: lg tv 42lv450 does not start

                  Yes if you like. But maybe leave it for now to see if you get a picture.
                  Did I leave the soldering iron on?

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                    #49
                    Re: lg tv 42lv450 does not start

                    Note that this could also be an EEPROM issue. No amount of reflow will fix that.
                    Did I leave the soldering iron on?

                    Comment


                      #50
                      Re: lg tv 42lv450 does not start

                      is clear, but if I change motherboard then I always have problems with the eprom? can I mount that of another but identical model?

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                        #51
                        Re: lg tv 42lv450 does not start

                        run reflow but nothing has changed, another question and then do not bother you anymore, I ordered the motherboard found for the same model of TV, mounting the new one I have to remove the resistance from 1ohm from power on? thank you for your time

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                          #52
                          Re: lg tv 42lv450 does not start

                          Yes. Don't have that resistor there with new board.
                          Did I leave the soldering iron on?

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                            #53
                            Re: lg tv 42lv450 does not start

                            thanks again I will keep you updated

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                              #54
                              Re: lg tv 42lv450 does not start

                              can I install this main? the product code is different but the data is identical
                              Attached Files

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                                #55
                                Re: lg tv 42lv450 does not start

                                ???

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                                  #56
                                  Re: lg tv 42lv450 does not start

                                  I'm not to sure I can't read the data on the 2nd picture. If they have a return policy could probably get away if it doesn't work
                                  Did I leave the soldering iron on?

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                                    #57
                                    Re: lg tv 42lv450 does not start

                                    thanks again for your help, the original card has the following serial: eax64113202 (0). I would like to mount the following model: eax64290501 (0). what data do you need?

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                                      #58
                                      Re: lg tv 42lv450 does not start

                                      Sometimes even if the model number of the TV is the same they may have changed panels or some other significance throughout the model year. Sometimes those numbers change sometimes you get lucky and it works anyway

                                      So the model number of the TV the board is coming out of is the same as yours?
                                      Did I leave the soldering iron on?

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                                        #59
                                        Re: lg tv 42lv450 does not start

                                        the model of my tv is the following: LG 42LV450A-ZC. while that of the card I would like to buy is this: LG 42LV450U-ZC. practically changes (A) and (U)

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                                          #60
                                          Re: lg tv 42lv450 does not start

                                          That's interesting that it's in front of the character designator after the- Usually anything That has to do with the model number before the hyphen usually means a product change. Like I said before the least you could do is try it if it doesn't work return it.

                                          I have used Samsung main boards that were for a year difference same size and swapped T cons between 2 different models with no problem before so you may get lucky
                                          Did I leave the soldering iron on?

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