Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

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  • matyka
    Senior Member
    • Jan 2015
    • 179
    • Uk
    #21
    Re: Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

    Hi,resolder all the pins on all 8 transformers and the tv worked for about 30-40 min and now has the same fault.
    Dim Voltage =3.291v before and after backlight turns off
    BL-ON ??/I could not found .is BR1 the same ?
    BR1=2.070v
    How I block the protection OZ964GN ?

      Comment

      • Maklaud
        Senior Member
        • Sep 2015
        • 56
        • Russia
        #22
        Re: Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

        http://english.electronica-pt.com/lcd-repair?p=OZ964

          Comment

          • matyka
            Senior Member
            • Jan 2015
            • 179
            • Uk
            #23
            Re: Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

            I have a new inverter board and the tv is working now for the last 2 days.
            I measures all the 8 transf. on both boards and they are the same readings.

              Comment

              • CapLeaker
                Leaking Member
                • Dec 2014
                • 7972
                • Canada
                #24
                Re: Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

                maybe one of those IC's are damaged that sit in front of each transformer.
                http://www.shopjimmy.com/cmo-27-d008...-inverter.htm#

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA
                    #25
                    Re: Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

                    I wonder about the condition of those 4 filter caps on that inverter board.
                    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

                      • CapLeaker
                        Leaking Member
                        • Dec 2014
                        • 7972
                        • Canada
                        #26
                        Re: Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

                        that too.

                          Comment

                          • Maklaud
                            Senior Member
                            • Sep 2015
                            • 56
                            • Russia
                            #27
                            Re: Lg 32LC46 Backlight cuts out after tv on for 3-4 sec

                            I think some of the bad transformers. (I mean inside spark or closes).

                              Comment

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