LN40C530F1R died (shortcut home)

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  • enito
    Member
    • Jul 2009
    • 25
    #1

    LN40C530F1R died (shortcut home)

    Hi,
    I have in my a big shorcut in home, 2 LCD died. 220V here. Now reading info about this thread i opened

    https://www.badcaps.net/forum/showthread.php?t=40056
    "
    I looks like the P/N on the board is BN44-00340A? If it is, it is SAMSUNG power supply board. See SCH of 340B.
    http://www.shopjimmy.com/samsung-bn4...upply-unit.htm
    Can you please verify?
    340B is compatible with 340A so the pin out of the connectors are the same.
    The board has pull-up resistor for the POWER ON/OFF (PS_ON) and the BL_ON so you can disconnect the cable between the power supply connector CN802 and the main board, then plug the TV into the outlet the backlights should come on right away, if it does then the power supply board is OK."


    Yes i tested this one, and i get power of backlight,

    http://postimg.org/image/xnjzplewt/

    white poits is backlight works, now what is the next step? main board died? eeprom flash broken with shortcut? can be reprogrammed? or change board?

    thx for your time of read this!
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: LN40C530F1R died (shortcut home)

      Main board in depth troubleshooting will be next. Without diagram will be difficult. I myself never have luck fixing the SAMSUNG main board, may be some one can chime in.
      You may start looking to see if it has any blown fuses, voltage regulator ICs, etc.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • enito
          Member
          • Jul 2009
          • 25
          #3
          Re: LN40C530F1R died (shortcut home)

          Hi i see , blow fused and stuff from power supply? cause if backlight is working, PSU is 100% OK? now the main board of this model can be found for replace?

            Comment

            • enito
              Member
              • Jul 2009
              • 25
              #4
              Re: LN40C530F1R died (shortcut home)

              I found service manual, can help,

              http://www.filedropper.com/ceb416x118729

                Comment

                • enito
                  Member
                  • Jul 2009
                  • 25
                  #5
                  Re: LN40C530F1R died (shortcut home)

                  What about reset eeprom? can fix this? from manual exist a combination of remote control for do factory default.
                  I read about eeprom reset with join of pins,
                  http://wiki.samygo.tv/index.php5/UnB...y_EEPROM_Reset

                  Greets

                    Comment

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