RCA 42LA45RQ Backlight inverter board

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  • Luff
    New Member
    • Jan 2016
    • 6
    • Canada
    #1

    RCA 42LA45RQ Backlight inverter board

    Hi Guys I have a bit of an issue my T.V's backlight recently got very dim but the bottom was still well lit. I played around in setting trying to fix it and then I could smell burning plastic coming from the T.V I shut it off and took it apart. After taking back cover off right away I noticed were it was burning and it was the Backlight inverter from my understanding. However after searching online for a replacement part I did not find any and was wondering if I could just repalce the capacitors even though the board is slightly burned as shown in the pictures.Model Number is

    AY1420801
    3BS0016314

    Thank you for you input

    -Anton
    Attached Files
    Last edited by Luff; 01-27-2016, 07:56 PM.
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: RCA 42LA45RQ Backlight inverter board

      You have burnt out ballast caps (current limiter for the CCFL) which probably failed shorted or has leakage resistance.
      What are the text printed on the caps that are not damaged? I usually replace them all at the same time. You may also may have worn out lamps that are drawing too much current.
      Last edited by budm; 01-27-2016, 10:28 PM.
      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

        • fcp
          New Member
          • Jan 2017
          • 1
          • CA
          #3
          Re: RCA 42LA45RQ Backlight inverter board

          What was your solution for this?
          I have the exact same board with blown caps on CON6...

          The markings on the other caps are 15J 6KV... I don't even know where to begin looking for replacements... or if I need a new board.

          Any help is greatly appreciated.

          Originally posted by Luff
          Hi Guys I have a bit of an issue my T.V's backlight recently got very dim but the bottom was still well lit. I played around in setting trying to fix it and then I could smell burning plastic coming from the T.V I shut it off and took it apart. After taking back cover off right away I noticed were it was burning and it was the Backlight inverter from my understanding. However after searching online for a replacement part I did not find any and was wondering if I could just repalce the capacitors even though the board is slightly burned as shown in the pictures.Model Number is

          AY1420801
          3BS0016314

          Thank you for you input

          -Anton
          Attached Files

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: RCA 42LA45RQ Backlight inverter board

              http://www.digikey.com/product-detai...001-ND/4457598
              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

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