LG Flatron L204WS

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  • matthmal
    Badcaps Veteran
    • Nov 2012
    • 306
    • Malta

    #1

    LG Flatron L204WS

    Hi,

    I have another monitor, an LG Flatron L204WS which was blown by means of a surge.

    Every time that I plug it into the mains, my house electricity cuts off.

    What I have Done:

    I looked for possible bad caps but physically they all look ok.

    I noticed two capacitors which have some green marks on them. You will find these in the attachments.

    I don't know which is the fuse in order to test it.

    Hope that someone can help me.
    Attached Files
  • Pentium4
    CapXon Be Gone
    • Sep 2011
    • 3741
    • USA

    #2
    Re: LG Flatron L204WS

    The fuse is that black thing to the left of that X cap (going off of the 4th picture) you should test it

    Comment

    • matthmal
      Badcaps Veteran
      • Nov 2012
      • 306
      • Malta

      #3
      Re: LG Flatron L204WS

      which one please? How would you know which is the fuse?

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: LG Flatron L204WS

        F101 (it has black shrink tubing on its body) next to the white 2-pin connector and the yellow capacitor.
        If the fuse is blown, then you plug this unit into the outlet, it should not cause the main electric to cut off isnce it will not draw any current due to blown fuse.
        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

        Comment

        • selldoor
          Slow Learner
          • Dec 2010
          • 7870

          #5
          Re: LG Flatron L204WS

          Hey - you never said you had this - sockets look same as the 1504s?

          Pictures are just a little out of focus and we need to see the backs of the boards.

          If you can see check when the board is in the frame that the mains and fuse solder joints do not touch the frame?
          Last edited by selldoor; 11-30-2012, 12:35 PM.
          Please upload pictures using attachment function when ask for help on the repair
          http://www.badcaps.net/forum/showthread.php?t=39740

          Comment

          • matthmal
            Badcaps Veteran
            • Nov 2012
            • 306
            • Malta

            #6
            Re: LG Flatron L204WS

            I have just brought this yesterday that's why and I also have a tv.

            I will take the pictures and post them here. The fuse is fine hehe. How can I test this as I can't connect it to the mains.

            Comment

            • selldoor
              Slow Learner
              • Dec 2010
              • 7870

              #7
              Re: LG Flatron L204WS

              Check the board doesnt touch the frame as above, is one test.

              Meter on 2000 ohms put one probe on each mains input pin and report.

              Do it again with just the power board and nothing else connected.
              Please upload pictures using attachment function when ask for help on the repair
              http://www.badcaps.net/forum/showthread.php?t=39740

              Comment

              • matthmal
                Badcaps Veteran
                • Nov 2012
                • 306
                • Malta

                #8
                Re: LG Flatron L204WS

                Power on right?

                Comment

                • selldoor
                  Slow Learner
                  • Dec 2010
                  • 7870

                  #9
                  Re: LG Flatron L204WS

                  WRONG NO NO NO.!
                  Basic rule
                  Test voltage power on Test resistance power off

                  Besides which you have already said it just blows
                  Please upload pictures using attachment function when ask for help on the repair
                  http://www.badcaps.net/forum/showthread.php?t=39740

                  Comment

                  • selldoor
                    Slow Learner
                    • Dec 2010
                    • 7870

                    #10
                    Re: LG Flatron L204WS

                    Just had a thought - perhaps its the mains lead that is faulty?

                    Test that - unplugged- meter on ohms 2000 see if the live and neutral short out.
                    result should be the same as just holding the probes apart. - If there is an earth wire try it again live > earth neutral>earth
                    Please upload pictures using attachment function when ask for help on the repair
                    http://www.badcaps.net/forum/showthread.php?t=39740

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #11
                      Re: LG Flatron L204WS

                      I cannot see how the fuse on the board is OK, it is only about 2~3A fuse but it can take out the house breaker that is rated at 10~20A. Something must be shorted out BFORE the fuse.
                      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

                      Comment

                      • retiredcaps
                        Badcaps Legend
                        • Apr 2010
                        • 9271

                        #12
                        Re: LG Flatron L204WS

                        Originally posted by matthmal
                        Power on right?
                        Never for resistance measurements. Otherwise
                        --- begin sig file ---

                        If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                        We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                        Please do not post inline and offsite as they slow down the loading of pages.

                        --- end sig file ---

                        Comment

                        • matthmal
                          Badcaps Veteran
                          • Nov 2012
                          • 306
                          • Malta

                          #13
                          Re: LG Flatron L204WS

                          Thanks all for your replies. With reference to the following quoted test:

                          Originally posted by selldoor
                          Just had a thought - perhaps its the mains lead that is faulty?

                          Test that - unplugged- meter on ohms 2000 see if the live and neutral short out.
                          result should be the same as just holding the probes apart. - If there is an earth wire try it again live > earth neutral>earth
                          The results well all the same as holding the probes apart.

                          With reference to the below quote:

                          Originally posted by budm
                          I cannot see how the fuse on the board is OK, it is only about 2~3A fuse but it can take out the house breaker that is rated at 10~20A. Something must be shorted out BFORE the fuse.
                          I did test the fuse with a meter and it beeped so it means that it is ok. I can't understand as this monitor was blown with a surge during a thunderstorm.

                          Comment

                          • retiredcaps
                            Badcaps Legend
                            • Apr 2010
                            • 9271

                            #14
                            Re: LG Flatron L204WS

                            Originally posted by matthmal
                            I did test the fuse with a meter and it beeped so it means that it is ok.
                            A beep is no guarantee that the fuse is good. Some multimeters will beep for resistance readings less than 1800 ohms.

                            A good fuse will measure less than 1.0 ohms.
                            --- begin sig file ---

                            If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                            We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                            Please do not post inline and offsite as they slow down the loading of pages.

                            --- end sig file ---

                            Comment

                            • matthmal
                              Badcaps Veteran
                              • Nov 2012
                              • 306
                              • Malta

                              #15
                              Re: LG Flatron L204WS

                              ok so the reading is 000. more photos will follow

                              Comment

                              • matthmal
                                Badcaps Veteran
                                • Nov 2012
                                • 306
                                • Malta

                                #16
                                Re: LG Flatron L204WS

                                please find attached photos of the back of the board. There are photos from different angles just to make it clearer and easier to see.
                                Attached Files

                                Comment

                                • selldoor
                                  Slow Learner
                                  • Dec 2010
                                  • 7870

                                  #17
                                  Re: LG Flatron L204WS

                                  Picture one is ok the other three are not.
                                  Can you still do this from an earlier post POWER OFF

                                  Check the board doesnt touch the frame as above, is one test.

                                  Meter on 2000 ohms put one probe on each mains input pin and report.

                                  Do it again with just the power board and nothing else connected.
                                  Please upload pictures using attachment function when ask for help on the repair
                                  http://www.badcaps.net/forum/showthread.php?t=39740

                                  Comment

                                  • matthmal
                                    Badcaps Veteran
                                    • Nov 2012
                                    • 306
                                    • Malta

                                    #18
                                    Re: LG Flatron L204WS

                                    I already did it as written in a previous post and the results where the same as it if the probes are not touching. I did this test with the board out of the frame.

                                    Comment

                                    • selldoor
                                      Slow Learner
                                      • Dec 2010
                                      • 7870

                                      #19
                                      Re: LG Flatron L204WS

                                      Power off meter on ohms 2000 Can you also check across TH101 and VR 101
                                      both near the mains socket. Is that green component behind the TH101 glass and does it look broken?
                                      Please upload pictures using attachment function when ask for help on the repair
                                      http://www.badcaps.net/forum/showthread.php?t=39740

                                      Comment

                                      • selldoor
                                        Slow Learner
                                        • Dec 2010
                                        • 7870

                                        #20
                                        Re: LG Flatron L204WS

                                        Originally posted by matthmal
                                        I already did it as written in a previous post and the results where the same as it if the probes are not touching. I did this test with the board out of the frame.
                                        I thought that answer just related to the mains lead test as that is what you quoted
                                        Please upload pictures using attachment function when ask for help on the repair
                                        http://www.badcaps.net/forum/showthread.php?t=39740

                                        Comment

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