Hitachi 50HYT62U no picture

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  • Bloopeta
    Badcaps Veteran
    • Jun 2018
    • 526
    • United Kingdom

    #1

    Hitachi 50HYT62U no picture

    Hitachi 50HYT62U, has backlights but no picture, just completely blank screen, any ideas anyone??
    Attached Files
  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12137
    • U.S.

    #2
    Re: Hitachi 50HYT62U no picture

    See if you have about 12 volts on each side of the fuse on tcon board.

    Comment

    • Bloopeta
      Badcaps Veteran
      • Jun 2018
      • 526
      • United Kingdom

      #3
      Re: Hitachi 50HYT62U no picture

      Originally posted by nomoresonys
      See if you have about 12 volts on each side of the fuse on tcon board.
      12.08v on each side

      Comment

      • nomoresonys
        Badcaps Legend
        • Jan 2013
        • 12137
        • U.S.

        #4
        Re: Hitachi 50HYT62U no picture

        Try unplugging the wifi module, check for any change.

        Comment

        • Bloopeta
          Badcaps Veteran
          • Jun 2018
          • 526
          • United Kingdom

          #5
          Re: Hitachi 50HYT62U no picture

          Originally posted by nomoresonys
          Try unplugging the wifi module, check for any change.
          Tried that, no change.

          Also tried holding power button for 60 seconds, plugging in tv, and continuing to hold a further 60 seconds

          Comment

          • nomoresonys
            Badcaps Legend
            • Jan 2013
            • 12137
            • U.S.

            #6
            Re: Hitachi 50HYT62U no picture

            Any chips on the tcon or mainboard getting really hot?

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Hitachi 50HYT62U no picture

              What do you get on the screen if you only have one ribbon cable between LCD panel and the T-CON connected one at a time?
              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

              • Bloopeta
                Badcaps Veteran
                • Jun 2018
                • 526
                • United Kingdom

                #8
                Re: Hitachi 50HYT62U no picture

                Originally posted by budm
                What do you get on the screen if you only have one ribbon cable between LCD panel and the T-CON connected one at a time?
                If I unplug the left ribbon, I get no change.

                If I unplug the right ribbon, I get the attached pic
                Attached Files

                Comment

                • Bloopeta
                  Badcaps Veteran
                  • Jun 2018
                  • 526
                  • United Kingdom

                  #9
                  Re: Hitachi 50HYT62U no picture

                  Originally posted by Bloopeta
                  If I unplug the left ribbon, I get no change.

                  If I unplug the right ribbon, I get the attached pic
                  Just hoping its not the LCD panel thats at fault :/

                  Comment

                  • nomoresonys
                    Badcaps Legend
                    • Jan 2013
                    • 12137
                    • U.S.

                    #10
                    Re: Hitachi 50HYT62U no picture

                    Guess you could test your caps on the driver board for shorts or very low ohms.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #11
                      Re: Hitachi 50HYT62U no picture

                      The LCD panel has integrated T-CON board and also located at the bottom edge of the LCD panel which is easily damaged by the cleaning liquid, so inspect the T-CON/Tab bonding board for damages and also check the caps resistance as suggested.
                      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

                      • Bloopeta
                        Badcaps Veteran
                        • Jun 2018
                        • 526
                        • United Kingdom

                        #12
                        Re: Hitachi 50HYT62U no picture

                        Originally posted by nomoresonys
                        Guess you could test your caps on the driver board for shorts or very low ohms.

                        Originally posted by budm
                        The LCD panel has integrated T-CON board and also located at the bottom edge of the LCD panel which is easily damaged by the cleaning liquid, so inspect the T-CON/Tab bonding board for damages and also check the caps resistance as suggested.

                        Doesnt appear to be any damage to anything. Which baord is the driver board??

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: Hitachi 50HYT62U no picture

                          "Doesnt appear to be any damage to anything. Which board is the driver board??"
                          So you remove the LCD frame to get to the T-CON/Tab bonding boards?
                          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

                          • Bloopeta
                            Badcaps Veteran
                            • Jun 2018
                            • 526
                            • United Kingdom

                            #14
                            Re: Hitachi 50HYT62U no picture

                            Originally posted by budm
                            "Doesnt appear to be any damage to anything. Which board is the driver board??"
                            So you remove the LCD frame to get to the T-CON/Tab bonding boards?
                            Yes, Ive had the screen out n checked the backlights whilst I was on

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #15
                              Re: Hitachi 50HYT62U no picture

                              Show us the pictures of the boards that are connected to the LCD panel..
                              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

                              • Bloopeta
                                Badcaps Veteran
                                • Jun 2018
                                • 526
                                • United Kingdom

                                #16
                                Re: Hitachi 50HYT62U no picture

                                Originally posted by budm
                                Show us the pictures of the boards that are connected to the LCD panel..
                                Hope these help as hard to fit all in pic with being long
                                Attached Files

                                Comment

                                • nomoresonys
                                  Badcaps Legend
                                  • Jan 2013
                                  • 12137
                                  • U.S.

                                  #17
                                  Re: Hitachi 50HYT62U no picture

                                  Yep those are the driver boards.

                                  Comment

                                  • Bloopeta
                                    Badcaps Veteran
                                    • Jun 2018
                                    • 526
                                    • United Kingdom

                                    #18
                                    Re: Hitachi 50HYT62U no picture

                                    Originally posted by nomoresonys
                                    Yep those are the driver boards.
                                    Great, so which bits do you need ohm readings from?

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #19
                                      Re: Hitachi 50HYT62U no picture

                                      There are many caps on those boards, you have done them before in other threads, did you not?
                                      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

                                      • Bloopeta
                                        Badcaps Veteran
                                        • Jun 2018
                                        • 526
                                        • United Kingdom

                                        #20
                                        Re: Hitachi 50HYT62U no picture

                                        Originally posted by budm
                                        There are many caps on those boards, you have done them before in other threads, did you not?
                                        No, I have never done anything with these boards before

                                        Comment

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