LG 37LG55 LCDTV standby problem

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  • stringer
    New Member
    • Jun 2011
    • 3
    #1

    LG 37LG55 LCDTV standby problem

    After reading some threads here Im ironically comforted by other people with similar problems (they dont build stuff like they used to).

    I have a 37lc55 and the standby mode is starting to get persistent. I have to try up to 5 times now to get the tv to switch on from standby. It's been getting a little worse from a week ago when when it 1st happened.

    I see a lot of suggestions for ZSUS boards being guilty in situations like this.

    Does mine sound like a ZSUS problem?
    Does anyone know where I can get a spare (UK/Europe)?
    Does anyone know the part number?
    Last edited by stringer; 06-16-2011, 03:51 PM.
    Tags: None
    • PlainBill
      Badcaps Legend
      • Feb 2009
      • 7034
      • USA
      #2
      Re: LG 37LG55 LCDTV standby problem

      Originally posted by stringer
      After reading some threads here Im ironically comforted by other people with similar problems (they dont build stuff like they used to).

      I have a 37lc55 and the standby mode is starting to get persistent. I have to try up to 5 times now to get the tv to switch on from standby. It's been getting a little worse from a week ago when when it 1st happened.

      I see a lot of suggestions for ZSUS boards being guilty in situations like this.

      Does mine sound like a ZSUS problem?
      Does anyone know where I can get a spare (UK/Europe)?
      Does anyone know the part number?
      This is a very rare card, so rare it's called 'nonexistium'. Z-sus (or Z-Sustain) boards are only used on plasma TVs. You have an LCD TV.

      PlainBill
      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

        Comment

        • retiredcaps
          Badcaps Legend
          • Apr 2010
          • 9271
          #3
          Re: LG 37LG55 LCDTV standby problem

          Originally posted by stringer
          I have to try up to 5 times now to get the tv to switch on from standby.
          This sounds like potentially bad caps. As the caps warm up, their ESR (ohms) drops and allows the TV to come on.

          You will have to open up the tv and look for bad caps.
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            Comment

            • stringer
              New Member
              • Jun 2011
              • 3
              #4
              Re: LG 37LG55 LCDTV standby problem

              Thanks for the reply, my repair work only ever extended to dry joints until now but if the TV continues to fail I will have nothing to lose in trying.

              2 more questions..
              What does a bad cap look like? Burnt, swollen or what?
              Are bad caps just bad caps or is there likely to be a root cause (like leaving the TV on standby nearly every minute it's not being watched)?

                Comment

                • Dgtech
                  E. Technician
                  • Apr 2009
                  • 1462
                  • Steeler
                  #5
                  Re: LG 37LG55 LCDTV standby problem

                  Swollen is the answer. If you need a picture, just type that in google and search for images. You might find a few. lol. Just wanted to add that they dont have to be swollen to be bad. Sometimes they get out of tolerance and act like higher or lower capacitors.
                  Last edited by Dgtech; 06-17-2011, 05:17 PM.
                  The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

                    Comment

                    • stringer
                      New Member
                      • Jun 2011
                      • 3
                      #6
                      Re: LG 37LG55 LCDTV standby problem

                      Originally posted by Dgtech
                      ..Sometimes they get out of tolerance and act like higher or lower capacitors.
                      That helps Im Starting to understand the reason this site exists now.

                        Comment

                        • adisavaro
                          New Member
                          • Nov 2013
                          • 4
                          • Romania
                          #7
                          Re: LG 37LG55 LCDTV standby problem

                          Hi everybody. I have same problem to startup from standby with LG 37LC52. I donn't know what capacitor to replace. Do you have any schematics or could you help me with C reference designators and values? Thanks a lot.

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK
                              #8
                              Re: LG 37LG55 LCDTV standby problem

                              The failed capacitors on these models are very obvious when they fail. Post a picture of your power board.
                              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                Comment

                                • adisavaro
                                  New Member
                                  • Nov 2013
                                  • 4
                                  • Romania
                                  #9
                                  Re: LG 37LG55 LCDTV standby problem

                                  I put some picture with my board. My TV is LG 37LC51 not 37LC52.
                                  Attached Files

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK
                                      #10
                                      Re: LG 37LG55 LCDTV standby problem

                                      Good luck. You have four capacitors that are very obviously failed; replacing those should fix the issue. I would recommend replacing all the capacitors at the same time.
                                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                        Comment

                                        • truep
                                          Badcaps Veteran
                                          • Aug 2010
                                          • 373
                                          • USA
                                          #11
                                          Re: LG 37LG55 LCDTV standby problem

                                          I see at least 4 swollen caps on that board. Replace all of the caps above the dotted line (top). Use Panasonic FM or FC series caps. Even though some look ok, they will fail and you will have the problem.

                                            Comment

                                            • truep
                                              Badcaps Veteran
                                              • Aug 2010
                                              • 373
                                              • USA
                                              #12
                                              Re: LG 37LG55 LCDTV standby problem

                                              Beat me again Tom!!LOL

                                                Comment

                                                • adisavaro
                                                  New Member
                                                  • Nov 2013
                                                  • 4
                                                  • Romania
                                                  #13
                                                  Re: LG 37LG55 LCDTV standby problem

                                                  Thanks for help, I will order them.

                                                    Comment

                                                    • adisavaro
                                                      New Member
                                                      • Nov 2013
                                                      • 4
                                                      • Romania
                                                      #14
                                                      Re: LG 37LG55 LCDTV standby problem

                                                      I just replaced that 4 blown caps and is working perfectly. Thanks!!

                                                        Comment

                                                        • tom66
                                                          EVs Rule
                                                          • Apr 2011
                                                          • 32560
                                                          • UK
                                                          #15
                                                          Re: LG 37LG55 LCDTV standby problem

                                                          Recommend you do all of those caps to make sure it's perfect.
                                                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                                            Comment

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