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SONY Bravia KD-55SD8505 Please HELP!

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    SONY Bravia KD-55SD8505 Please HELP!

    Hi!My Sony Bravia Kd55Sd8505 2times red blinking!what is a problem?how i can repair that?
    After flash usb they turning on but only backlight, remote and sound works,no picture! only one vertical line by the center!Please help me somebody who knows what kind of problem!I will very appreciate!
    Attached Files
    Last edited by goluins; 07-16-2020, 11:10 PM.

    #2
    Re: SONY Bravia KD-55SD8505 Please HELP!

    probably T-con issue what do the fuses measure on the T-con

    Comment


      #3
      Re: SONY Bravia KD-55SD8505 Please HELP!

      you wrote you have just sound. to approve if you have video signal. just connect the sony with extra TV via scart.. be sure the scart side of the sony side had out put video signal.. if you see the video on the second tv mean main boards okay.. go ahead with t-con check

      Comment


        #4
        Re: SONY Bravia KD-55SD8505 Please HELP!

        Surely you have a bad panel, i see for the first time a tcon with 3 outputs, so the screen is splitted in 3, since you have a central line that i don't see so probably the fault is in central screen board or source cof, but much probably is in side COG not fully repairable. I can't explain all now it's late night...

        Comment


          #5
          Re: SONY Bravia KD-55SD8505 Please HELP!

          What is it COG?

          Comment


            #6
            Re: SONY Bravia KD-55SD8505 Please HELP!

            new T-con installed!!

            Comment


              #7
              Re: SONY Bravia KD-55SD8505 Please HELP!

              then?

              Comment


                #8
                Re: SONY Bravia KD-55SD8505 Please HELP!

                Then 2 times red blink and no voltage to the mainboard! 19.8v 2pinouts and 2.2v 1pinout on mainboard!no 3.3! what is it?

                Comment


                  #9
                  Re: SONY Bravia KD-55SD8505 Please HELP!

                  Look thru the the little holes in the back, are your backlights purple? You might have more than one issue.
                  Last edited by nomoresonys; 07-22-2020, 11:29 AM.

                  Comment


                    #10
                    Re: SONY Bravia KD-55SD8505 Please HELP!

                    no, backlights is white color and its absolutely normal!
                    Last edited by goluins; 07-22-2020, 12:46 PM.

                    Comment


                      #11
                      Re: SONY Bravia KD-55SD8505 Please HELP!

                      i said bad panel..

                      Comment


                        #12
                        Re: SONY Bravia KD-55SD8505 Please HELP!

                        Originally posted by goluins View Post
                        Then 2 times red blink and no voltage to the mainboard! 19.8v 2pinouts and 2.2v 1pinout on mainboard!no 3.3! what is it?
                        Can you please clarify that? I do not understand what you are indicating "and no voltage to the mainboard! 19.8v 2pinouts and 2.2v 1pinout on mainboard!no 3.3!"
                        Those Voltages are correct with the old t-con board and now they are not correct?
                        Can we see good clear hi-res straight shots of the whole T-CON board?
                        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


                          #13
                          Re: SONY Bravia KD-55SD8505 Please HELP!

                          Ok give 10 min please!

                          Comment


                            #14
                            Re: SONY Bravia KD-55SD8505 Please HELP!

                            here they are
                            Attached Files

                            Comment


                              #15
                              Re: SONY Bravia KD-55SD8505 Please HELP!

                              1-tcon 2-mainboard 3-power supply with led driver

                              Comment


                                #16
                                Re: SONY Bravia KD-55SD8505 Please HELP!

                                19.8v and 2.2v from powersup. to the mainbord! 2times red blinked!

                                Comment


                                  #17
                                  Re: SONY Bravia KD-55SD8505 Please HELP!

                                  Originally posted by goluins View Post
                                  19.8v and 2.2v from powersup. to the mainbord! 2times red blinked!
                                  I am confused.
                                  1) So the 19.8V is the Voltage from the AC adapter where DC jack is, correct?
                                  2) Where is this this 2.2V are measured at? So you have the 2.2V when old T-CON board is installed, correct?
                                  3) How about the 3.3V you are talking about? So you have the 3.3V when old T-CON board is installed, correct?
                                  4) So with the new T-CON board you are still getting 2-blink, correct?
                                  5) So how does the TV acts differently between Old and New T-CON board? Still getting backlights and same image as in your post # 1 when new T-CON is installed? I am trying understand what is going on.
                                  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


                                    #18
                                    Re: SONY Bravia KD-55SD8505 Please HELP!

                                    1)Yes! the 19.8V is the Voltage from the AC adapter where DC jack is
                                    2)the Voltage from the AC adapter where DC jack is!!
                                    3)no 3.3v at all!!!old t-con is on short!!
                                    4)Yes! Its only on new Tcon board!!Old tcon shows white screen and the line
                                    5)Only if I flash usb port!but after unplug and restart, 2red blinks))
                                    Yes Tcon is installed)
                                    Attached Files

                                    Comment


                                      #19
                                      Re: SONY Bravia KD-55SD8505 Please HELP!

                                      Originally posted by goluins View Post
                                      1)Yes! the 19.8V is the Voltage from the AC adapter where DC jack is
                                      2)the Voltage from the AC adapter where DC jack is!!

                                      3)no 3.3v at all!!!old t-con is on short!!
                                      4)Yes! Its only on new Tcon board!!Old tcon shows white screen and the line
                                      5)Only if I flash usb port!but after unplug and restart, 2red blinks))
                                      Yes Tcon is installed)
                                      So you are telling me that you only get 2.2V at the dc input jack instead of 19V when you install new T-CON board? It sounds like your T-CON board is bad and loading down the 19VDC adapter, the adapter is probably in shutdown/start cycle.
                                      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


                                        #20
                                        Re: SONY Bravia KD-55SD8505 Please HELP!

                                        i see confusion in the answers.. better to carry the tv to tv tinkerer..

                                        Comment

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