Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

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  • safesurfer65
    Senior Member
    • Feb 2014
    • 112
    • Scotland
    #1

    Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

    Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

    Tested main power supply/main board connector and can only get voltage from one pin which constantly varies from 2v-3.5v

    Suspected power supply fault ?

    Any ideas ?

    Thanks

    Mal
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    • Andrew F. Ali
      Badcaps Legend
      • Jan 2014
      • 2450
      • Trinidad & Tobago
      #2
      Re: Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

      Disconnect all jacks from the PSU leaving the AC Input jack. Plug in the TV to the AC and see if STDBY 5Vdc is produced. On your DMM remember BLACK probe on the chassis and the RED probe on the Pin to be tested, selector on 20Vdc. Report your results.

        Comment

        • safesurfer65
          Senior Member
          • Feb 2014
          • 112
          • Scotland
          #3
          Re: Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

          Hi

          Thanks for the reply. If I unplug the LED driver board I get a steady 5.2v on the standby pin but when I plug the LED driver board back in it jumps around from 2v-3.6v ??

          Thanks

          Mal
          Last edited by safesurfer65; 08-29-2015, 10:29 AM.

            Comment

            • Andrew F. Ali
              Badcaps Legend
              • Jan 2014
              • 2450
              • Trinidad & Tobago
              #4
              Re: Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

              Try unplugging the jack that goes from the PSU to the MAIN BD with the LED Driver BD unplugged also. Then measure the STDBY 5Vdc and see if it is stable or not.

                Comment

                • safesurfer65
                  Senior Member
                  • Feb 2014
                  • 112
                  • Scotland
                  #5
                  Re: Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

                  Hi

                  I reckon I've sourced the problem to being the LED driver board because if its unplugged from the PSU the TV turns on for a few seconds obviously without any picture then the TV turns off with a single blinking standby light. Seems to be a weak point in this particular TV going by the amount that sell on Ebay.

                  Thanks

                  Mal

                    Comment

                    • Andrew F. Ali
                      Badcaps Legend
                      • Jan 2014
                      • 2450
                      • Trinidad & Tobago
                      #6
                      Re: Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

                      Great!! Hope I was of some help......

                        Comment

                        • safesurfer65
                          Senior Member
                          • Feb 2014
                          • 112
                          • Scotland
                          #7
                          Re: Panasonic 50" LED TV TX-L50B6B Not Switching on - 3 Flashes from Standby Light

                          Yes thanks you were !

                            Comment

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