Sony XR-55A80J OLED TV 5 blinks - Troubleshooting steps

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  • jason123
    Badcaps Legend
    • Oct 2015
    • 1090
    • USA
    #1

    Sony XR-55A80J OLED TV 5 blinks - Troubleshooting steps

    Hi there,
    I see a couple of posts related to the troubleshooting of similar TV. The one I have is acting slightly differently and I'd love your help.

    So it has the 5 blinks. Previous owner got a TCON, no luck. Got a new Main board (though he didn't do the USB firmware update), again, no improvements.

    I see 2 posts that are relevant:
    https://www.badcaps.net/forum/troubl...j-oled-5-blink
    https://www.badcaps.net/forum/troubl...grade-possible

    So I disconnected the Main board from the circuit. Added a jumper between PWR_ON, TCON_12_ON and EVDD_ON and STBY

    Now all I get on the screen is backlight (screen lit up) but no colors on the screen.
    The EVDD on the TCON is 18.8 V
    The TCON_12 is 12.76 V
    Note that with TCON disconnected, the above voltages don't change much.

    I saw in other posts that EVDD should be higher? but I don't know maybe the 55" (Smaller) can live with lower voltage?

    Any suggestions on how to proceed?
    Thank you
    Attached Files
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    • Diah
      Badcaps Legend
      • Feb 2013
      • 6461
      • Germany
      #2
      Originally posted by jason123
      Hi there,
      I see a couple of posts related to the troubleshooting of similar TV. The one I have is acting slightly differently and I'd love your help.

      So it has the 5 blinks. Previous owner got a TCON, no luck. Got a new Main board (though he didn't do the USB firmware update), again, no improvements.

      I see 2 posts that are relevant:
      https://www.badcaps.net/forum/troubl...j-oled-5-blink
      https://www.badcaps.net/forum/troubl...grade-possible

      So I disconnected the Main board from the circuit. Added a jumper between PWR_ON, TCON_12_ON and EVDD_ON and STBY

      Now all I get on the screen is backlight (screen lit up) but no colors on the screen.
      The EVDD on the TCON is 18.8 V
      The TCON_12 is 12.76 V
      Note that with TCON disconnected, the above voltages don't change much.

      I saw in other posts that EVDD should be higher? but I don't know maybe the 55" (Smaller) can live with lower voltage?

      Any suggestions on how to proceed?
      Thank you
      OLED had no BL , put the the original T-CON and do the test again, post photo of your screen

        Comment

        • jason123
          Badcaps Legend
          • Oct 2015
          • 1090
          • USA
          #3
          Hi,
          This is the original TCON and Main board, I'm told. He bought them and when they didn't fix the TV he returned them.
          Yes, I'm aware there is no BL in the light-bulb sense, but I wasn't sure how to describe. I can provide photo shortly, but there is no hint of color or any activity other than you can tell it's on
          Last edited by jason123; Today, 04:59 PM.

            Comment

            • jason123
              Badcaps Legend
              • Oct 2015
              • 1090
              • USA
              #4
              Here is a photo of the TV with it on - just brighter screen, no color
              Attached Files
              Last edited by jason123; Today, 04:59 PM.

                Comment

                • lotas
                  Badcaps Legend
                  • Jan 2016
                  • 4787
                  • Russia
                  #5

                  You forgot to connect one LVDS cable. We tried replacing these two LVDS cables with others; they're a common problem with Sony.
                  Attached Files

                    Comment

                    • jason123
                      Badcaps Legend
                      • Oct 2015
                      • 1090
                      • USA
                      #6
                      Originally posted by lotas
                      You forgot to connect one LVDS cable. We tried replacing these two LVDS cables with others; they're a common problem with Sony.
                      Sorry, just so I understand... I need to connect the upper LVDS between the main board and the TCON or connect both LVDS cables? Even with the main board not powered?

                      So to speed things up... I tried with one lvds cables connected at a time then with both and no change. Nothing is coming on the screen other than being lit up
                      Last edited by jason123; Today, 08:27 PM.

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