Sony XR-55X90J 4 blinks

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  • Nicktronic
    Badcaps Veteran
    • Mar 2023
    • 247
    • Canada
    #1

    Sony XR-55X90J 4 blinks

    Hey guys, got this Sony that turns on momentarily and then goes black with 4 blinks of the standby light. I can't find a service manual, but best guess was the Local Dimming board based on a similar TV saying LD_ERR or BCM_ERR. I found a replacement, but it didn't work. Before I put more money into replacement boards, Im wondering if anybody has seen this issue and what worked for them, or has the service manual for this specific TV.

    Thanks!
    Attached Files
    Tags: None
    • EazyBone
      Badcaps Legend
      • Jun 2023
      • 1317
      • United states
      #2
      Look for nicks tvs video on YouTube where he takes out the BL err pin and grounds it to the chassis. Maybe you'll find the problem goes away and or you can see a dead led in the set.

      ​​​​​Need a closer picture on the legend for PSU. This isn't a OLED is it?
      Last edited by EazyBone; 02-15-2024, 09:48 PM.

        Comment

        • Nicktronic
          Badcaps Veteran
          • Mar 2023
          • 247
          • Canada
          #3
          It's not an OLED. Tried what you/Nick's suggested, i grounded out the BL-ERR pin (pin 1 on my power supply board), but no luck. I pulled pin 1 wire from the connector on the power supply board and grounded it to chassis with a jumper. Originally, I saw that when the TV fails, the BL-ERR jumps up in voltage, but doesn't latch. So don't think it's my backlights.....or at least not the same problem as in the video.

            Comment

            • Nicktronic
              Badcaps Veteran
              • Mar 2023
              • 247
              • Canada
              #4
              Close up of the power board connector pinout
              1 Photo

                Comment

                • lotas
                  Badcaps Legend
                  • Jan 2016
                  • 4573
                  • Russia
                  #5
                  4x - code error
                  Attached Files

                    Comment

                    • Nicktronic
                      Badcaps Veteran
                      • Mar 2023
                      • 247
                      • Canada
                      #6
                      Ok, is there a troubleshooting procedure? Looks like T-Con according to your attachment. What do you mean by code error? Software?

                        Comment

                        • lotas
                          Badcaps Legend
                          • Jan 2016
                          • 4573
                          • Russia
                          #7
                          The chassis is the same as yours, here is the service manual and the procedure for dealing with errors
                          https://www.manualslib.com/manual/20...page=38#manual

                            Comment

                            • Nicktronic
                              Badcaps Veteran
                              • Mar 2023
                              • 247
                              • Canada
                              #8
                              Ok, so the BE_LD_RDY (CL5223) voltage was low, so I guess it's the Main Board since it's not an OLED and I already replaced the Local Dimming board?

                                Comment

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