Sony KDL-55EX500 solid green screen

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  • Nopy
    New Member
    • Mar 2022
    • 4
    • Canada

    #1

    Sony KDL-55EX500 solid green screen

    I have a Sony KDL-55EX500 which shows a solid green screen and I haven't been able to diagnose the problem. I was able to find a repair manual online and read a few forums on tv repair which pointed me towards it possibly being an issue with the power board or T-con board. Bad electrolytic capacitors seemed to be a common theme so I tried replacing all of the ones on on the power board, but that didn't fix it.

    My next step was disconnecting all of the cables and reconnecting them. That helped a bit, showing a normal screen most of the time, but still switches back to solid green intermittently. I tried heating up the T-con board with a hair dryer for a bit and that seemed to resolve the problem for a day, but the next day the green screen came back, which has me wondering if it's a bad solder joint or bad lvds connection.

    Any advice/confirmation on pinpointing the issue would be appreciated. I saved this tv from someone who was taking it to the dump so I'm trying not to spend much on it. I do apologize if I got any part names wrong. I've never fixed a tv before and can count on one hand the number of electronics I've fixed in my life.
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  • dskall
    Badcaps Legend
    • Oct 2016
    • 2905
    • usa

    #2
    Re: Sony KDL-55EX500 solid green screen

    I would say you need to concentrate on your cable between t-con and main board. Any damaged contacts. If you can clean contacts.
    I assume no responsibility for any stupid suggestions I might post.

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    • Nopy
      New Member
      • Mar 2022
      • 4
      • Canada

      #3
      Re: Sony KDL-55EX500 solid green screen

      Originally posted by dskall
      I would say you need to concentrate on your cable between t-con and main board. Any damaged contacts. If you can clean contacts.
      I gave this a try today and cleaned the cable ends and connectors on the T-con board and main board with rubbing alcohol. The intermittent green screen still shows up.

      I did find one solder joint on the T-con that looked cracked so I added more solder but that didn't help either.

      Comment

      • dskall
        Badcaps Legend
        • Oct 2016
        • 2905
        • usa

        #4
        Re: Sony KDL-55EX500 solid green screen

        I would try wiggling cable and moving connectors. Taping on t-con and main board to see if anything changes. Should be able to narrow an intermittent down.
        I assume no responsibility for any stupid suggestions I might post.

        Comment

        • Nopy
          New Member
          • Mar 2022
          • 4
          • Canada

          #5
          Re: Sony KDL-55EX500 solid green screen

          I’ve tried wiggling the cable/connectors and when it seems like it’s working, the screen goes green again later on. What do you mean by taping? Like just securing it with tape?

          Comment

          • nomoresonys
            Badcaps Legend
            • Jan 2013
            • 12085
            • U.S.

            #6
            Re: Sony KDL-55EX500 solid green screen

            I think I would throw a new tcon at it.

            Comment

            • nomoresonys
              Badcaps Legend
              • Jan 2013
              • 12085
              • U.S.

              #7
              Re: Sony KDL-55EX500 solid green screen

              this one looks like a match, need to match up the numbers on the white sticker as described there in the ad if you get one: https://www.ebay.com/itm/15254981916...Zh5NG#shpCntId

              Comment

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