LG 32LK330 after lightning strike

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  • miguy
    Member
    • Aug 2013
    • 12
    • USA
    #1

    LG 32LK330 after lightning strike

    Had a lightning strike very close to my house that took out a few electronic devices including this LG 32" LCD TV. Trying to fix it, so popped the case off. A few of the other components that got hit had obvious charred area's, but this one has got me. Everything inside looks perfectly normal.

    It's model LG 32LK330. I am getting a flashing red light when trying to turn it on, and no screen. It was attached to a small DirecTV box that allows me to access my main DVR. The HDMI on this DirecTV unit stopped working, but the box itself is working via other cables.

    So I know there was some issues with the HDMI, but not sure if what fried the TV was via the HDMI or the power supply.

    It's a similar issue to this guy: LG TV red light flashing

    What he did was replace the power supply board, and that didn't work, so he replaced the main board and that fixed it.

    Any thoughts? Here are some pictures, I know some of you are so good you can spot a blown capacitor, but to my untrained eye everything looks good.
    Attached Files
    Tags: None
    • Ltank
      Badcaps Veteran
      • Jun 2013
      • 776
      • USA
      #2
      Re: LG 32LK330 after lightning strike

      I had a LG LCD Tv that lightning hit and damaged the DVD player taking out the HDMI port. All the SMOS voltages were good, even the STBY 5vdc. Set would turn on but no video or OSD. I found where you can get a free service manual but I did not notice blink codes. http://www.electronica-pt.com/index....down/id,20750/

      Ltank

        Comment

        • polotampa
          New Member
          • Jan 2014
          • 2
          • usa
          #3
          Re: LG 32LK330 after lightning strike

          Hdmi 1
          Attached Files

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: LG 32LK330 after lightning strike

              I would look real close at the HDMI chip and around that area, look real close on the top of the IC for small hole. I had VIZIO with lighting damaged that had HDMI IC that looks normal until I look real close with magnifying glass and see small pin hole on top of the IC.
              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

                • Ltank
                  Badcaps Veteran
                  • Jun 2013
                  • 776
                  • USA
                  #5
                  Re: LG 32LK330 after lightning strike

                  I looked at som pics online of the mainboard.The fried part has three legs?
                  D821 ? A6? What I found A6 to be is BAW62 a three legged device with two diodes inside the three legged package. Clean the carbon from the traces and remove the burnt places before putting new part back in and powering up. Got you a Service Manual with Schematics but I have not looked carefully at them yet.
                  Attached Files

                    Comment

                    • Ltank
                      Badcaps Veteran
                      • Jun 2013
                      • 776
                      • USA
                      #6
                      Re: LG 32LK330 after lightning strike

                      I reviewed the schematic. On page 24 D821 (A6 a BAS16T Dual Common Cathode) switching diode. Schematic list it as ENKMC2838-T112. Bad news is the cathodes tie to IC801 a AT24C02BN-SH-T EEPROM. It killed your HDMI 1 port. Remove it, clean thhe carbon from the traces in the area it burnt. Your other HDMI may still work. Maybe. The Anodes of D821 tie to the same point that feeds the other two HDMI diode anodes and those diodes feed their respective EEPROMs. Good Luck
                      Last edited by Ltank; 01-24-2014, 08:22 PM. Reason: more info

                        Comment

                        • polotampa
                          New Member
                          • Jan 2014
                          • 2
                          • usa
                          #7
                          Re: LG 32LK330 after lightning strike

                          R875 and R876 - 22 ohm are open

                            Comment

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