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Hitachi 42hxt12u

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    #1

    Hitachi 42hxt12u

    Hi i have this tv its getting no back light but the tv is on iv checked the power going to the back light and im gettin 117 volt to the back light board is this right its led
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    #2
    Re: Hitachi 42hxt12u

    Any ideas what voltage should run through these ?

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      #3
      Re: Hitachi 42hxt12u

      We need MUCH better pictures of the whole back side of the TV so we can see how all the boards are connected and then good clear pictures of the board and where you took the Voltage measurement.
      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

        #4
        Re: Hitachi 42hxt12u

        hi, 've got the same issue with this model. anyone had a got at fixing one?

        I have no backlight and no output it seems from the power board to the back lights, any idea what switches the BL on?

        fixed lots of other LCD and PLasmas but these LEDs are tripping me up a little,

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          #5
          Re: Hitachi 42hxt12u

          Its not a real Hitachi but a rebadged Vestel shit. Uses VES420 Led backlit Lcd panel. You probably have a blown Led with in the panel. But you need better images so we can HELP you diagnose the fault.
          Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

          https://www.facebook.com/Telford-Tel...7894576335359/

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            #6
            Re: Hitachi 42hxt12u

            Reeceyburger123 im not too far from you in oswestry

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              #7
              Re: Hitachi 42hxt12u

              Ive picked up one of these tvs as spares or repair and it turns out that the previous owner had attached the stand with wood screws!! It had taken out 2 traces of one of the ribbon cables that attaches the tcon board to the screen. I have seperated and jumpered the 2 damaged traces and im now getting continuity across them but still no picture. Backlight seems fine with no dark spots. Upon starting the tv up it goes through a cycle of blue and red lights and then stays on blue indicating the power supply is functional i think but im wondering if the wood screw has shorted the tcon board? Any info on this would be greatly appreciated cheers

              Comment

                #8
                Re: Hitachi 42hxt12u

                You need a new tcon have seen that before

                You need to use exact size screws, or this happens.

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                  #9
                  Re: Hitachi 42hxt12u

                  Thanks for the quick reply zomi, very much appreciated. Im glad my thought process was on the right track! All the best

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