LG 32LX1D will not turn on

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #121
    Re: LG 32LX1D will not turn on

    @jammies: Thanks for posting the repair feedback, glad that it is just bad cap.
    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

    • Crrose
      Senior Member
      • Dec 2013
      • 165
      • Usa

      #122
      Re: LG 32LX1D will not turn on

      I have tried 2 different soldering irons, a copper wick and solder pump and still can't get my cap off. Solder is flush with board but can't remove the last part stuck between the board. Any ideas before I ruin the board holding the soldering iron on too long?

      Comment

      • momaka
        master hoarder
        • May 2008
        • 12168
        • Bulgaria

        #123
        Re: LG 32LX1D will not turn on

        I use this method for removing capacitors:
        https://www.badcaps.net/forum/showpo...7&postcount=23

        After you plug in your iron and it heats up for a good 5 minutes, just add some fresh solder to the capacitor legs. This will greatly improve the heat transfer from the iron's tip to the solder on the PCB. Then use above method to "walk" or "rock" the capacitor out.

        You can put the new capacitor in the same way again. But first, it would probably be very helpful to clear the holes on the board a little bit. I use a sewing needle or one of those poster/board tacks. The hole doesn't have to be completely clear. Just making indentations where the capacitor should go is good enough. If you don't fully clear the holes on the board, however, then I suggest you pre-cut the capacitor leads before installing it on the board.

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #124
          Re: LG 32LX1D will not turn on

          40~60Watts Iron makes it much easier too than trying to use 25~30W iron.
          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

          • Crrose
            Senior Member
            • Dec 2013
            • 165
            • Usa

            #125
            Re: LG 32LX1D will not turn on

            Thanks, I will try adding some solder and see if I can get ahold of a 40-60 watt iron.

            Comment

            • Crrose
              Senior Member
              • Dec 2013
              • 165
              • Usa

              #126
              Re: LG 32LX1D will not turn on

              Well I would like to thank everyone who chimed in with possible solutions. I was finally able to get that cap #126 out and replaced it. TV works like a charm again. Can't believe TV repair shop told me $275.00 to fix because the PSU was shot as well as the video board.

              That hair blower trick sure came in handy.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #127
                Re: LG 32LX1D will not turn on

                Hair dryer is one of my important tool, people that do not have experience laugh at me when I told them to use hair dryer to heat up the caps, they thought I was joking.
                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

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #128
                  Re: LG 32LX1D will not turn on

                  Same for me, can't count how many times I've narrowed down a fault with hairdryer and freeze spray.
                  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

                  • Crrose
                    Senior Member
                    • Dec 2013
                    • 165
                    • Usa

                    #129
                    Re: LG 32LX1D will not turn on

                    Well it looks like I jumped the gun a little. Replaced Cap #126 and everything was fine, started right up. Put TV back together and back in the house. Sat for about a week in my house. Went to hook up a Wii station for the kids while I watch the Championship games today. Plugged TV in and red light comes on, turn it on and green light comes on then reverts back to flashing red light and dims out loosing all the power after about 10 seconds. Could that Cap #126 be bad or is there some other problem I need to look into. Haven't taken TV back apart yet.

                    Comment

                    • selldoor
                      Slow Learner
                      • Dec 2010
                      • 7870

                      #130
                      Re: LG 32LX1D will not turn on

                      Did you read post 119?
                      Please upload pictures using attachment function when ask for help on the repair
                      http://www.badcaps.net/forum/showthread.php?t=39740

                      Comment

                      • Crrose
                        Senior Member
                        • Dec 2013
                        • 165
                        • Usa

                        #131
                        Re: LG 32LX1D will not turn on

                        Yes, I returned that one to Fry's and went to an electronic store and got another one and put it on. Don't remember the name of that one but I guess it was just as bad or could it be something else?

                        Comment

                        • Crrose
                          Senior Member
                          • Dec 2013
                          • 165
                          • Usa

                          #132
                          Re: LG 32LX1D will not turn on

                          Ordering all new capacitors from Digi-Key. They are a mixed lot of Panasonic and Nichocan, however 2 of them are 16v 1000uf made by Vishay BC (it's they only ones they have in this size). Should I not get those 2 and order them from somewhere else? I checked Badcaps.net and they don't sell them either. I also checked Hobbymods and they have everything my Nichocan but don't carry the 10v 100uf.

                          I would hate to have to have 2 different orders and pay shipping twice.
                          Last edited by Crrose; 01-20-2014, 09:05 PM.

                          Comment

                          • selldoor
                            Slow Learner
                            • Dec 2010
                            • 7870

                            #133
                            Re: LG 32LX1D will not turn on

                            What about either of these - care both different sizes

                            http://www.digikey.com/product-detai...397-ND/2433531

                            http://www.digikey.com/product-detai...398-ND/2433532
                            Please upload pictures using attachment function when ask for help on the repair
                            http://www.badcaps.net/forum/showthread.php?t=39740

                            Comment

                            • multimeter
                              Badcaps Veteran
                              • Jan 2011
                              • 739
                              • united kingdom

                              #134
                              Re: LG 32LX1D will not turn on

                              Originally posted by Crrose
                              Ordering all new capacitors from Digi-Key. They are a mixed lot of Panasonic and Nichocan, however 2 of them are 16v 1000uf made by Vishay BC (it's they only ones they have in this size). Should I not get those 2 and order them from somewhere else? I checked Badcaps.net and they don't sell them either. I also checked Hobbymods and they have everything my Nichocan but don't carry the 10v 100uf.

                              I would hate to have to have 2 different orders and pay shipping twice.
                              the 10v 100uf cap,you could replace with a 16v if you have more chance of getting it from same supplier,just make sure it fits!
                              fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                              ----------------------------------------------
                              please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                              Comment

                              • Crrose
                                Senior Member
                                • Dec 2013
                                • 165
                                • Usa

                                #135
                                Re: LG 32LX1D will not turn on

                                Excellent, I didn't know I could go up in the voltage rating. I can get the 16v 100uf made by Nichocon then and everything will be Nichocon.

                                I just noticed they come in various sizes for the same thing, how do I know which sizes to order? Like the 47uf 50v have .60x.25 and .45x.20.
                                Last edited by Crrose; 01-21-2014, 11:27 AM.

                                Comment

                                • selldoor
                                  Slow Learner
                                  • Dec 2010
                                  • 7870

                                  #136
                                  Re: LG 32LX1D will not turn on

                                  Originally posted by Crrose
                                  I just noticed they come in various sizes for the same thing, how do I know which sizes to order? Like the 47uf 50v have .60x.25 and .45x.20.
                                  You measure the old ones? and or the space they have to fit in.

                                  Many caps come in different sizes for the same value like the 2 panasonic fr
                                  I suggested
                                  Please upload pictures using attachment function when ask for help on the repair
                                  http://www.badcaps.net/forum/showthread.php?t=39740

                                  Comment

                                  • salukidude
                                    New Member
                                    • Nov 2014
                                    • 2
                                    • USA

                                    #137
                                    Re: LG 32LX1D will not turn on

                                    Hi, new member here. I have this 32LX1D also. It's been making a loud clicking sound for awhile now. It's maybe 6 clicks per second. Recently, my Yamaha a/v receiver died and it turned out to be a bad regulator. At that point I realized it could be the PSU in the TV going bad that caused that. More recently I've noticed the clicking sound corresponds with flickering in light bulbs on the same circuit.

                                    I took the TV apart and the clicking only happens with video input. It's coming from either the gigantocap or something within less then an inch of it. None of the other capacitors appear damaged. I have 5V on ST5.0V, the rail measures 9.3 kOhm, and the voltage across gigantocap is 162V but that was without inputs or outputs to the PSU, just AC (if it makes a difference).

                                    Secondly, not that I want to troubleshoot this, but just as a point of reference I bought a new PSU board for the TV. It worked great for 10 minutes with no clicking sound, but when I turned up the volume kind of loud on my repaired Yamaha, the TV shut off and will not turn back on. The red light turns to green and it flashes a few times before resetting and doing that continuously. This PSU measures 4.5V on ST5.0V, and also has 9.3 kOhms on the rail with 162V across gigantocap.

                                    I switched back to the original PSU and it still works, just with loud clicking that causes my light bulbs to flicker and is probably damaging my Yamaha again.

                                    Can anyone please offer some suggestions? I'm guessing it has to be on the primary side of the PSU since it's having an effect on my other electrical devices. I wonder if switching the gigantocap between the two PSU's would fix everything. Thanks!

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #138
                                      Re: LG 32LX1D will not turn on

                                      You should check the Voltage at the AC outlet to see how much it drops down when you turn up your volume on the YAMAHA. if you can not play the music loud without dropping the Voltage then you should check out your house wiring. You can also use heater or hair dryer to see how much the AC drops down at the outlets.
                                      The DC Voltage on the main cap at standby is 165~170V and should jump up to >360V when TV is turned on due to the fact that the PFC Voltage will kick in when PS_ON is received from the main board.
                                      How are the caps on the old and the replacement boards?
                                      Last edited by budm; 11-13-2014, 09:47 AM.
                                      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

                                      • salukidude
                                        New Member
                                        • Nov 2014
                                        • 2
                                        • USA

                                        #139
                                        Re: LG 32LX1D will not turn on

                                        Thanks budm. The caps on both boards are visually ok, but that's all I can say about them. I checked the PFC cap on both boards, and each one measured 162V with just AC, and were upwards of 400V with the TV connected to the PSU. When the TV is on, the voltage is up and down like sawtooth, 0 to 500+ V. In any case, I now think the clicking sound might be coming from the PFC transformer and not the cap. I'm talking about the transformer circled in your post #20 picture.

                                        Which device would make such a clicking sound? It's seriously just about the same period as this Usually after an hour or so of the TV being on, the clicking will stop. At this point my light bulbs stop flickering. It seems to all come down to the clicking. I might be able to post a video with sound if you think that would help.

                                        Comment

                                        • momaka
                                          master hoarder
                                          • May 2008
                                          • 12168
                                          • Bulgaria

                                          #140
                                          Re: LG 32LX1D will not turn on

                                          Originally posted by salukidude
                                          The caps on both boards are visually ok, but that's all I can say about them.
                                          If your power supply looks anything like the pictures posted on page 1 of this thread, chances are you have SamWha or some other equally inferior caps. Moreover, the power supply appears to be working fine other than the clicking noise when cold, so this seems to support the idea of bad caps present.

                                          I suggest you change the startup caps for ST5.0V first. It's been a while since I last looked at this thread (and much more the schematics that were posted), but the APFC primary side circuitry is likely supplied with power from the auxiliary winding of the ST5.0V power supply. So a standby start-up cap replacement is highly recommended.

                                          Better yet, if you are going to pay for shipping for a single cap or two from Mouser or Digikey, you might as well order caps for the rest of the power supply. I usually suggest to exclude the big HV cap from that purchase list, but since this power supply appears to make unusual noises from the APFC circuit, this cap may also be going bad. I can't say for sure because I don't know how bad SamWha high voltage caps are. If this was CapXon or Samxon, I would suggest a replacement no doubt. Since those big high voltage caps tend to be expensive ($3-5), I'll say use your judgment based on your budget.
                                          Last edited by momaka; 11-14-2014, 08:29 PM.

                                          Comment

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