Lg tv - 47lb6530-td

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  • damboo
    New Member
    • Feb 2020
    • 5
    • Oman
    #1

    Lg tv - 47lb6530-td

    HI!

    I would like to ask for help. I do have 47" LG TV. suddenly while watching the screen goes off and when I turn it on again the RED LIGHT blinks three times and will become steady without the screen on. I suspect the PSU got damage. I pull out the PSU and checked the supply pin going to the mainboard and getting all the specified voltages like 3.5v, 12V, power on, PPDIM2 and PDIM1 except I'm not able to get the 24v. Does it mean the PSU is fine or maybe the mainboard is the one damage?

    PLS HELP!
    THANKS!!!!!
    Tags: None
    • damboo
      New Member
      • Feb 2020
      • 5
      • Oman
      #2
      Re: Lg tv - 47lb6530-td

      Originally posted by damboo
      HI!

      I would like to ask for help. I do have 47" LG TV. suddenly while watching the screen goes off and when I turn it on again the RED LIGHT blinks three times and will become steady without the screen on. I suspect the PSU got damage. I pull out the PSU and checked the supply pin going to the mainboard and getting all the specified voltages like 3.5v, 12V, power on, PPDIM2 and PDIM1 except I'm not able to get the 24v. Does it mean the PSU is fine or maybe the mainboard is the one damage?

      PLS HELP!
      THANKS!!!!!
      I attached the PSU diagram
      Attached Files

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Lg tv - 47lb6530-td

          Can we see good clear straight shot of the whole top and bottom side of the power supply boars?
          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

            • damboo
              New Member
              • Feb 2020
              • 5
              • Oman
              #4
              Re: Lg tv - 47lb6530-td

              I really don't know what just happen. but I'm getting now the voltages 3.5v,12v, and 24v but no backlight. but no voltage reading at DRV-ON, P-DIM1 and P-DIM2. as I understand to the BASIC LCD TROUBLE SHOOTING you had shared to me (thank you for that). 12v and 24v would not turn on without pressing the power button switch. but on my case, once the tv plug in to 220v the red power indicator immediately blinks 2 or 3 times and become steady without pressing the power on button. and at the same the other voltages are on except for those DRV-ON, P-DIM 1and 2. I begin to doubt the mainboard is defective.
              I uploaded the PSU images.
              Attached Files

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12145
                  • U.S.
                  #5
                  Re: Lg tv - 47lb6530-td

                  Why would you doubt mainboard issue, drv-on signal COMES from mainboard so I am doubting the mainboard.

                    Comment

                    • damboo
                      New Member
                      • Feb 2020
                      • 5
                      • Oman
                      #6
                      Re: Lg tv - 47lb6530-td

                      Thank you guys for helping me out. I would replace the mainboard.

                        Comment

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