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Sony Bravia 55ex710 picture problem

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    #1

    Sony Bravia 55ex710 picture problem

    A friend asked me to take a look at this tv and see if it could be fixed. He said the screen would be jumpy and doubled when it turned on and would clear up after a while. The while got longer and it no longer clears up. I attached a picture of the screen, although it doesn't show how it flickers and jumps. I checked as best as I could and didn't see anything obvious on any of the boards. I unplugged and reseated all the cables, as well as put pressure on the frame for the tabs and nothing made any difference. I thought it might be the mainboard and tried to find a replacement, but I can not find one yet.

    Most of the mainboard is very small smd's and I am unsure how to test these and thought it was just easier to replace the board. Since that is not the case, with the board being unavailable, I was hoping to get some advice from this forum as to any possibilities of what else I could do. I am able to test with a multi-meter (but still learning) and can solder and desolder fairly well. I am concerned about the large area in the upper right side. Could this be a panel issue? Any help would be appreciated.
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    #2
    Re: Sony Bravia 55ex710 picture problem

    That's interesting. . Never seen one quite like that. I'm tempted to say panel ot tcon. Leaning more towards panel problem
    Did I leave the soldering iron on?

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      #3
      Re: Sony Bravia 55ex710 picture problem

      When I first turned it on today, the right side was duplicated on the left side, but down the screen further. Could a panel problem do that?

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        #4
        Re: Sony Bravia 55ex710 picture problem

        Try twisting the panel by grabbing the corners, also use a hair dryer in the tab bond areas, search this forum and YouTube for tab bond issues, I hope this helps.
        Last edited by MisterD; 10-28-2015, 10:22 AM.

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          #5
          Re: Sony Bravia 55ex710 picture problem

          I tried twisting the screen and the hair dryer on the tabs, made no difference. I did try putting the hair dryer on the t-con board and most of the screen cleared up. It still flickered, but much less. I tried taking the cables off each side of the t-con to get it to make a difference and then tried to put the left one into the right side and then the other side. When I did this I had to remove the t-con from the panel and after this the screen went blank and I can't seem to get it to come back on. I assume I must have shorted something, but I can't seem to find it. I tried checking all the fuses on each board and they all seemed to check out good. Any suggestions as to what I could check?

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            #6
            Re: Sony Bravia 55ex710 picture problem

            Well now you may have damaged the panel. This is a no-no as the FRP ribbons drive the opposite sides on each side of the panel so essentially you just applied 12 volts into a section that doesn't require it. You could try atcon and cross your fingers but I believe you did panel damage
            Last edited by freakaftr8; 10-29-2015, 10:48 PM.
            Did I leave the soldering iron on?

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              #7
              Re: Sony Bravia 55ex710 picture problem

              looks like you damaged the t-con board it's not the first time someone made a boo boo i've done loads

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