Successful LCD panel repair XBR55X850B

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  • freakaftr8
    Badcaps Legend
    • Oct 2012
    • 3743
    • USA
    #1

    Successful LCD panel repair XBR55X850B

    Picked up this TV yesterday. Original owner said screen went out. Rather vague but OK as long as I didn't see any cracks I said why not. Only 40 bucks. My 65 cost 2300 new! It's a 55" version of the 65" and I've had for 3 years running strong up on the wall.

    When turned on right side black left side white with faint vertical stripes.

    My 1st rule of measure was to pull all covers off to expose LCD source driver boards on the panel itself.

    This is after trying one ribbon at a time trick. Left side would show a faint picture right side remained black.

    Checked MLCC capacitors and found right side shorted. Look for the lowest resistance reading in found one reading .7 Ω where the others are reading 1.8 Ω. So I went ahead and removed it knowing that all these capacitors work in series. The bad capacitor was the 1st one nearest the ribbons that go into the source board from the tcon.

    Powered up and have perfect picture!

    Removal pics to come as soon as I can find my USB cord.
    Attached Files
    Did I leave the soldering iron on?
    Tags: None
    • nomoresonys
      Badcaps Legend
      • Jan 2013
      • 12075
      • U.S.
      #2
      Re: Successful LCD panel repair XBR55X850B

      Originally posted by freakaftr8
      Picked up this TV yesterday. Original owner said screen went out. Rather vague but OK as long as I didn't see any cracks I said why not. Only 40 bucks. My 65 cost 2300 new! It's a 55" version of the 65" and I've had for 3 years running strong up on the wall.

      When turned on right side black left side white with faint vertical stripes.

      My 1st rule of measure was to pull all covers off to expose LCD source driver boards on the panel itself.

      This is after trying one ribbon at a time trick. Left side would show a faint picture right side remained black.

      Checked MLCC capacitors and found right side shorted. Look for the lowest resistance reading in found one reading .7 Ω where the others are reading 1.8 Ω. So I went ahead and removed it knowing that all these capacitors work in series. The bad capacitor was the 1st one nearest the ribbons that go into the source board from the tcon.

      Powered up and have perfect picture!

      Removal pics to come as soon as I can find my USB cord.
      Nice fix Freak, thanks for sharing

        Comment

        • nomoresonys
          Badcaps Legend
          • Jan 2013
          • 12075
          • U.S.
          #3
          Re: Successful LCD panel repair XBR55X850B

          So you got the low reading while in circuit or did you pull a leg?

            Comment

            • nomoresonys
              Badcaps Legend
              • Jan 2013
              • 12075
              • U.S.
              #4
              Re: Successful LCD panel repair XBR55X850B

              Dam nice score, 55 3D Smart tv. There's a firmware update warning. https://esupport.sony.com/US/p/model...OC=3#/howtoTab

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12075
                  • U.S.
                  #5
                  Re: Successful LCD panel repair XBR55X850B

                  Prob. not a big deal, says Some TV features stopped working properly after installing a software update released in May 2016. - Fix Available!

                    Comment

                    • freakaftr8
                      Badcaps Legend
                      • Oct 2012
                      • 3743
                      • USA
                      #6
                      Re: Successful LCD panel repair XBR55X850B

                      I got the low resistance reading in circuits. Remember to remove tcon ribbons 1st. I look for the lowest resistance reading on each of the 8 across the right. When you find the lowest resistance reading capacitor pull it cause that is usually the problem. Capacitors along source driver boards on panels should never have a low resistance reading. Not too sure why these things short out but it does happen.
                      Last edited by freakaftr8; 02-25-2018, 12:18 PM.
                      Did I leave the soldering iron on?

                        Comment

                        • freakaftr8
                          Badcaps Legend
                          • Oct 2012
                          • 3743
                          • USA
                          #7
                          Re: Successful LCD panel repair XBR55X850B

                          Nice! Everything after may 2016 is downgrading the tv. Typical...
                          Attached Files
                          Did I leave the soldering iron on?

                            Comment

                            • freakaftr8
                              Badcaps Legend
                              • Oct 2012
                              • 3743
                              • USA
                              #8
                              Re: Successful LCD panel repair XBR55X850B

                              Originally posted by nomoresonys
                              Dam nice score, 55 3D Smart tv. There's a firmware update warning. https://esupport.sony.com/US/p/model...OC=3#/howtoTab


                              Thx for the warning! I probably won't be doing an update lol
                              Did I leave the soldering iron on?

                                Comment

                                • nomoresonys
                                  Badcaps Legend
                                  • Jan 2013
                                  • 12075
                                  • U.S.
                                  #9
                                  Re: Successful LCD panel repair XBR55X850B

                                  Originally posted by freakaftr8
                                  I got the low resistance reading in circuits. Remember to remove tcon ribbons 1st. I look for the lowest resistance reading on each of the 8 across the right. When you find the lowest resistance reading capacitor pull it cause that is usually the problem. Capacitors along source driver boards on panels should never have a low resistance reading. Not too sure why these things short out but it does happen.
                                  Great info. thanks.

                                    Comment

                                    • nomoresonys
                                      Badcaps Legend
                                      • Jan 2013
                                      • 12075
                                      • U.S.
                                      #10
                                      Re: Successful LCD panel repair XBR55X850B

                                      Originally posted by freakaftr8
                                      Nice! Everything after may 2016 is downgrading the tv. Typical...
                                      Makes me wonder what the hell is wrong with the people running sony.

                                        Comment

                                        • freakaftr8
                                          Badcaps Legend
                                          • Oct 2012
                                          • 3743
                                          • USA
                                          #11
                                          Re: Successful LCD panel repair XBR55X850B

                                          Btw this is an LG built panel and tcon. Sony proprietary mainboard. The XBR75X850c had the same problem as well. That was a Samsung built panel. (S corp.) Which used to be a joint Sony/Samsung company sold primarily to Samsung Holdings a few years ago.
                                          Did I leave the soldering iron on?

                                            Comment

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