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Sony KDL-40hx723 5 blinking lights.

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    #21
    Re: Sony KDL-40hx723 5 blinking lights.

    So you get the exact same picture with both replacement boards?

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      #22
      Re: Sony KDL-40hx723 5 blinking lights.

      You probably shorted something out on the driver board between the tcon and panel, strip it down a little to get to the board for testing, youtube may have some good videos.

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        #23
        Re: Sony KDL-40hx723 5 blinking lights.

        Thanks, will try to check it out

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          #24
          Re: Sony KDL-40hx723 5 blinking lights.

          Hi, my Sony kdl-40hx723 has a red blinking light 5 times, I tried changing the t-con but nothing happens only the 4 white bands on the screen change position as shown on the attached photos. The screen illuminate only for about 3 seconds then off again. I have attached 2 photos one for each t-con . What could be the problem? Please help
          Attached Files
          Last edited by DRBENSONS; 01-12-2020, 03:27 AM.

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            #25
            Re: Sony KDL-40hx723 5 blinking lights.

            If 5 blinks is Tcon error, check for 12V on both sides of tcon fuse. If not present, check the SMD fuses on the main board since the 12V is switched from there. Bands/stripes are panel damage and may be unrelated. Do they appear with your old tcon board? Sony service manuals can be found online with schematics so you can trace the 12V supply to the tcon on the main board.

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              #26
              Re: Sony KDL-40hx723 5 blinking lights.

              They appear on both the old and new t-con, they just change the location when I change the t-con. Is the 12v on the fuse suppose to be there even when the tv is not on?

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                #27
                Re: Sony KDL-40hx723 5 blinking lights.

                Originally posted by DRBENSONS View Post
                They appear on both the old and new t-con, they just change the location when I change the t-con. Is the 12v on the fuse suppose to be there even when the tv is not on?

                The 12V for the tcon should be switched by the processor and only present when the tv is on. Odd that the fuse is in different locations. Did you match the tcon part number. Use shopjimmy as a reference.
                Last edited by neilc6; 01-13-2020, 01:39 PM.

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                  #28
                  Re: Sony KDL-40hx723 5 blinking lights.

                  Yes it's the same part number. Surprisingly at one point the tv powered on upto the sony logo for about 3 seconds but the letters of the word "sony" were inverted ,more like they are being viewed in a mirror

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                    #29
                    Re: Sony KDL-40hx723 5 blinking lights.

                    Did you go by the P/N as printed on the barcode sticker or by the number as printed on the board?
                    Lets see the pictures of both T-CON 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

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