LG 32LE5500 bad video

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  • angelos
    Badcaps Veteran
    • Dec 2012
    • 566
    • South Africa
    #1

    LG 32LE5500 bad video

    HI guys, i have this set with bad video, stripy jittery as best i can explain it.
    A youtube video is here below
    https://youtu.be/dqxnZPAzo-U
    I have attached some pics of the boards.
    The PSU voltages seem fine with no ripple
    There are two voltage regulators on the main board and measure 1.5V and 1.8V
    I suspect the main or tcon but might be wrong since i dont have a schematic for them.
    Is there any way i can prove its not the main so that i can focus on the tcon?

    Regards
    Angelos
    Attached Files
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    • Andrew F. Ali
      Badcaps Legend
      • Jan 2014
      • 2450
      • Trinidad & Tobago
      #2
      Re: LG 32LE5500 bad video

      Looks like a bad T-CON Bd. to me.

        Comment

        • angelos
          Badcaps Veteran
          • Dec 2012
          • 566
          • South Africa
          #3
          Re: LG 32LE5500 bad video

          Hi Andrew. Is there any way i can prove it?

            Comment

            • Andrew F. Ali
              Badcaps Legend
              • Jan 2014
              • 2450
              • Trinidad & Tobago
              #4
              Re: LG 32LE5500 bad video

              There a voltages test points on the T-CON Bd. to measure. However, you could disconnect one of the Ribbon cables connecting the T-CON Bd. to the Long Panel Bds. on the Screen. Do left side then right side and see if either half picture shows good or not.

                Comment

                • angelos
                  Badcaps Veteran
                  • Dec 2012
                  • 566
                  • South Africa
                  #5
                  Re: LG 32LE5500 bad video

                  I had done this test and it did not help. The side disconnected was white and the other side was making those same stripes. It did this to both sides. What does this mean? Panel or Tcon or main?

                  Regards
                  Angelos

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA
                      #6
                      Re: LG 32LE5500 bad video

                      It looks like main board issue.
                      Did you try heating or cooling the main board to see if it has any effect? Try that on T-CON too.
                      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

                        • angelos
                          Badcaps Veteran
                          • Dec 2012
                          • 566
                          • South Africa
                          #7
                          Re: LG 32LE5500 bad video

                          Hi Budm,
                          I heated the main board and when focusing heat on the processor the fault went away completely. This is a BGA type chip. There is no way i could resolder this chip. This one's going to the landfill.
                          Funny enough it is working fine now, and i did not apply much heat either.

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12096
                              • U.S.
                              #8
                              Re: LG 32LE5500 bad video

                              Maybe do a reflow, lots of tutorials on youtube about what temperatures to get to and so forth, sounds like it might respond favorably.

                                Comment

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