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    Sony XBR75X850C

    Hello,

    I am currently trying to repair a Sony Model XBR75X850C.
    The set has the dreaded 6 blinking error lights flashing. The set tries to startup with the screen illuminating but shuts down immediately
    I have replaced the main board but no change.

    So voltages from the G4 board are within range except one anomaly.
    I keep getting a 1.9 voltage reading from pin out location CN 6402 pin 4 BL_ERR. I don’t see where I should be getting any voltage reading from this pin?
    Anyone have any suggestions/recommendations?

    TIA
    Last edited by bstewara; 06-30-2019, 01:17 PM. Reason: Add photo

    #2
    Re: Sony XBR75X850C

    The LED flashing 6 times is a back-light error I believe.

    Comment


      #3
      Re: Sony XBR75X850C

      You are correct on the error code.
      I’m just wondering if I don’t have an issue with the ps board as well.

      Thank You

      Comment


        #4
        Re: Sony XBR75X850C

        It's possible, it could also be the LED driver board.

        Comment


          #5
          Re: Sony XBR75X850C

          I found a flow chart and it points to the LD or the G board.
          Thanks again

          Attached Files
          Last edited by bstewara; 06-30-2019, 07:56 PM. Reason: Add photo

          Comment


            #6
            Re: Sony XBR75X850C

            Anybody knows, what is a 4 blink code could be? It is for a 65X900C

            Comment


              #7
              Re: Sony XBR75X850C

              Originally posted by tibimakai View Post
              Anybody knows, what is a 4 blink code could be? It is for a 65X900C
              one here, also suggests doing a self diagnostic might clear up some issues.

              Four blinks
              - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

              Last edited by nomoresonys; 07-02-2019, 10:20 AM.

              Comment


                #8
                Re: Sony XBR75X850C

                Originally posted by tibimakai View Post
                Anybody knows, what is a 4 blink code could be? It is for a 65X900C
                Panel or LD board.

                Comment


                  #9
                  Re: Sony XBR75X850C

                  Possibly backlight led failure.

                  Comment


                    #10
                    Re: Sony XBR75X850C

                    https://www.youtube.com/watch?v=DyRdHSN43Y4

                    Bad LED is more likely. Do you have LED tester?
                    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


                      #11
                      Re: Sony XBR75X850C

                      4 red blinking error maybe LED driver or G board
                      Last edited by bstewara; 07-02-2019, 07:37 PM. Reason: Add text

                      Comment


                        #12
                        Re: Sony XBR75X850C

                        Attached Files

                        Comment


                          #13
                          Re: Sony XBR75X850C

                          Tibimakai why did you entered here with your own different problems? Better to open your own thread..

                          Comment


                            #14
                            Re: Sony XBR75X850C

                            The six flash error code is a backlight issue. Most probably, it is a dead LED. I have the 65" version of this TV and all it took was a $0.05 LED to fix. But you really "earn" the fix, because you have to dig all the way to the heart of the set to fix it.

                            Comment


                              #15
                              Re: Sony XBR75X850C

                              You are exactly right.
                              It's a big job for such a small item to repair

                              Comment


                                #16
                                Re: Sony XBR75X850C

                                Hi i have the 65 inch version sony bravia with 6 blinking lights , back light error.....
                                can you give me some advice how to remove the pannel......

                                i have done a few Philips 42 inch.......

                                Comment


                                  #17
                                  Re: Sony XBR75X850C

                                  Originally posted by Marty-Club View Post
                                  Hi i have the 65 inch version sony bravia with 6 blinking lights , back light error.....
                                  can you give me some advice how to remove the pannel......

                                  i have done a few Philips 42 inch.......
                                  Here`s the service manual for the xbr-55x850c, same type of chasis i think. The disassembly instructions start on page 12 .
                                  Attached Files
                                  All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                                  Comment


                                    #18
                                    Re: Sony XBR75X850C

                                    Originally posted by Marty-Club View Post
                                    Hi i have the 65 inch version sony bravia with 6 blinking lights , back light error.....
                                    can you give me some advice how to remove the pannel...
                                    Do a forum search. This has been discussed in other threads. I started a thread on exactly this issue.

                                    Comment

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