Toshiba LED Chromecast 65 65L621U

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  • amansilla
    New Member
    • May 2020
    • 6
    • United States
    #1

    Toshiba LED Chromecast 65 65L621U

    Hello everyone.
    I don't know how to start because I am new.
    My Toshiba 65 inc 65L621U is turning off randomly, but the sound continues and then it is hard to turn on.
    Sometimes just blink the logo and the red light is blinking.

    I switch the T board 55.65T46.C05 Toshiba T-Con Board and the PK101W1280I Toshiba Power Supply, FSP223-3FS01.
    I don't find a reasonable priced the 461C8K21L11 Toshiba Main Board.
    I am lost and I don't know what to do.
    As you can see in image 1 . When it works the image is good.

    Any help welcome.
    Thanks

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    Tags: None
    • neilc6
      Badcaps Legend
      • Nov 2015
      • 1550
      • Canada
      #2
      Re: Toshiba LED Chromecast 65 65L621U

      Sounds like failing LED backlights. Turn down the backlight level and see if it improves. Also turn off Dynalight or any feature that automatically adjusts the backlight level like an ambient light sensor.

        Comment

        • amansilla
          New Member
          • May 2020
          • 6
          • United States
          #3
          Re: Toshiba LED Chromecast 65 65L621U

          Thanks neilc6 . I will try tomorrow, but I believed it had to be with the main board for the hard time turning on.
          I will try

            Comment

            • neilc6
              Badcaps Legend
              • Nov 2015
              • 1550
              • Canada
              #4
              Re: Toshiba LED Chromecast 65 65L621U

              If it is hard to turn on then possibly mainboard if your voltages are stable. You may have multiple issues. Trying to stay away from Toshibas.

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales
                  #5
                  Re: Toshiba LED Chromecast 65 65L621U

                  If you turn the backlights down will it stay on longer?
                  It could be a led(s) problem which when heated up in use is failing especially since you say the sound continues.

                  Other than that you would need to take voltage readings to see what control signals are failing
                  Attached Files
                  Last edited by dick_barton; 05-30-2020, 02:03 AM.
                  Willing to help but I'm no expert.

                    Comment

                    • amansilla
                      New Member
                      • May 2020
                      • 6
                      • United States
                      #6
                      Re: Toshiba LED Chromecast 65 65L621U

                      Originally posted by dick_barton
                      If you turn the backlights down will it stay on longer?
                      It could be a led(s) problem which when heated up in use is failing especially since you say the sound continues.

                      Other than that you would need to take voltage readings to see what control signals are failing
                      Thanks, I will take the voltages measures. I believe it is not the led, but need some guidance

                        Comment

                        • nomoresonys
                          Badcaps Legend
                          • Jan 2013
                          • 12076
                          • U.S.
                          #7
                          Re: Toshiba LED Chromecast 65 65L621U

                          So DID it stay on longer if backlights are turned down??

                            Comment

                            • jason123
                              Badcaps Legend
                              • Oct 2015
                              • 1040
                              • USA
                              #8
                              Re: Toshiba LED Chromecast 65 65L621U

                              Hey amansilla... I bought your TV..
                              Yes, your backlight was out.. but there was panel damage at some point.. shadowing and slow refresh on the right hand side.. Parted out. Oh yeah, there was a section of bad pixels on the panel.

                                Comment

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