CTX S961A monitor

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  • flash0429
    Member
    • Mar 2012
    • 27
    • USA

    #1

    CTX S961A monitor

    have a CTX S961A monitor had it for a while for the desktop but then everyone in the household got laptops so we stopped using the desktop but i recently went back to get some files off of it and the monitor would not turn on at all i opened it up none of the capacitors are physically blown in anyway however there is one spot that looks like it was repaired or just badly put together in the first place any suggestions on this or as to why the monitor wont turn on here are some pics of the board and the specific location
    Attached Files
    Last edited by flash0429; 03-25-2012, 12:41 PM.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: CTX S961A monitor

    That is just the factory modification, may be they found problem but did not have the time to design the new circuit board to accommodate the added parts, they had to glue the parts down so it will not come loose after the unit is shipped to 1000 of miles away.
    Check and see if you do have about 165~170Vdc on that large black cap, be careful, you are working on the line side of the circuits, so you should at least plug this monitor into GFI outlet.
    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

    • flash0429
      Member
      • Mar 2012
      • 27
      • USA

      #3
      Re: CTX S961A monitor

      im getting 170V dc on the big cap

      Comment

      • flash0429
        Member
        • Mar 2012
        • 27
        • USA

        #4
        Re: CTX S961A monitor

        scratch that was getting 170 now only getting range of 2-4

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: CTX S961A monitor

          What happen? That is cap is fed by the bridge rectifier diode which is fed from the main incoming AC. Did you blow the main AC 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

            #6
            Re: CTX S961A monitor

            G Luxon Caps are reckoned to be pretty poor so even if not bulged or leaky may be
            dried out with age.
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment

            • flash0429
              Member
              • Mar 2012
              • 27
              • USA

              #7
              Re: CTX S961A monitor

              idk im still puzzled it was reading 170 i went back to check again and it was at 2 and slowly rising i kept it there for a bit and it rose to about 4 and thats when i stopped

              Comment

              • selldoor
                Slow Learner
                • Dec 2010
                • 7870

                #8
                Re: CTX S961A monitor

                Switch it off - un plug wait 5 mins then try over again.
                Check you meter is working ok while you wait


                N.B Polarity is important
                Last edited by selldoor; 03-25-2012, 05:14 PM. Reason: polarity
                Please upload pictures using attachment function when ask for help on the repair
                http://www.badcaps.net/forum/showthread.php?t=39740

                Comment

                • flash0429
                  Member
                  • Mar 2012
                  • 27
                  • USA

                  #9
                  Re: CTX S961A monitor

                  did tht meters fine still same reading

                  Comment

                  • jetadm123
                    Badcaps Legend
                    • Feb 2010
                    • 2169

                    #10
                    Re: CTX S961A monitor

                    How are you taking your voltage readings on that cap? If you're taking them using the solder pads, sometimes the pads will be covered with a clearcoat that prevents good contact with your probe leads. Otherwise, measure directly across the leads of the cap itself. Be careful! It's high voltage.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #11
                      Re: CTX S961A monitor

                      You can easily measure right on the legs of the caps. This monitor does not have the power switch on the back of the monitor, right?
                      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

                      • flash0429
                        Member
                        • Mar 2012
                        • 27
                        • USA

                        #12
                        Re: CTX S961A monitor

                        i was checking it from the legs of the cap and no it doesnt have a switch on the back of it i think i made a rookie mistake when i was checking the voltage and touched the metal directly behind the cap legs stupidity on my end espeacially since i know better then that

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: CTX S961A monitor

                          There should be a main AC fuse close to where the 120Vac POWER CABLE coming on the board, look for Fxxx
                          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

                          • flash0429
                            Member
                            • Mar 2012
                            • 27
                            • USA

                            #14
                            Re: CTX S961A monitor

                            i believe this is it right here
                            Attached Files

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #15
                              Re: CTX S961A monitor

                              That's correct, the red round component.
                              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

                              • flash0429
                                Member
                                • Mar 2012
                                • 27
                                • USA

                                #16
                                Re: CTX S961A monitor

                                so i have to unsolder that and replace it

                                Comment

                                • Jasgriff
                                  Badcaps Veteran
                                  • Feb 2012
                                  • 578
                                  • UK

                                  #17
                                  Re: CTX S961A monitor

                                  You need to see if it is blown before replacing it.
                                  Fixed so far : 1 Home cinema system, 16 LCD Monitors, 4 LCD TV's

                                  How to resize your pictures guide click HERE
                                  Retiredcaps Ideal post example click HERE

                                  Comment

                                  • flash0429
                                    Member
                                    • Mar 2012
                                    • 27
                                    • USA

                                    #18
                                    Re: CTX S961A monitor

                                    and just outta curiosity how should i do that...with the meter? cause i tried that and def not getting the readings im supposed to on it

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #19
                                      Re: CTX S961A monitor

                                      Monitor unplug from the out let, put your meter in Ohm mode, touch the two probes together, it should show the reading, mark that reading, then put the probes on the two legs of the fuse, the reading should be about the same as what you read when the two probes are short together. I assume that you know how to use your meter.
                                      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

                                      • flash0429
                                        Member
                                        • Mar 2012
                                        • 27
                                        • USA

                                        #20
                                        Re: CTX S961A monitor

                                        these are the reading i got
                                        Attached Files

                                        Comment

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