Samsung syncmaster 245BW no power at all

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  • moneyfairy
    Member
    • Jun 2013
    • 14
    • USA

    #1

    Samsung syncmaster 245BW no power at all

    My Samsung monitor died the other day, made a kind of cracking noise then shut off in the middle of a game. The power LED doesn't light up at all, and the screen doesn't come on at all either. Tried all the basic stuff, different cord outlets all that. I saw some youtube videos and replaced some of the capacitors that looked like they were bulging a little. Still nothing though, so thought i would come here and see if anyone had any ideas. I can post pictures just let me know what parts you need pictures of. Thanks a ton
    Attached Files
    Last edited by moneyfairy; 06-20-2013, 06:03 PM.
  • Pentium4
    CapXon Be Gone
    • Sep 2011
    • 3741
    • USA

    #2
    Re: Samsung syncmaster 245BW no power at all

    Were they CapXon? Replace ALL the capacitors. A lot of the little caps with no vents tend to dry out and stop working, also check the big cap for electrolyte leaking out the bottom.

    Pictures help

    Comment

    • moneyfairy
      Member
      • Jun 2013
      • 14
      • USA

      #3
      Re: Samsung syncmaster 245BW no power at all

      The capacitors were all Samwha capacitors.

      Comment

      • Pentium4
        CapXon Be Gone
        • Sep 2011
        • 3741
        • USA

        #4
        Re: Samsung syncmaster 245BW no power at all

        First off, check the fuses. Or maybe the startup cap is bad, usually 47uF 50V.

        Comment

        • ben7
          Capaholic
          • Jan 2011
          • 4059
          • USA

          #5
          Re: Samsung syncmaster 245BW no power at all

          The crack sound means something went pop for sure. Look at the transistors on the heatsinks for signs of failure - cracks in the plastic, a white spot, or burn/soot marks. Also check resistors. Take a look at any ICs on the bottom of the board, and see if they are burnt/cracked. Hope this helps!
          Muh-soggy-knee

          Comment

          • moneyfairy
            Member
            • Jun 2013
            • 14
            • USA

            #6
            Re: Samsung syncmaster 245BW no power at all

            i have visually inspected the boards really thoroughly but haven't been able to find anything unusual. I ordered all new resistors and some new fuses. I also attached some pictures.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Samsung syncmaster 245BW no power at all

              Make sure to remove those yellow/brownish color glues.
              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

              • ben7
                Capaholic
                • Jan 2011
                • 4059
                • USA

                #8
                Re: Samsung syncmaster 245BW no power at all

                Before you possibly waste new fuses, test the resistance across the big 450v filter capacitor.
                Muh-soggy-knee

                Comment

                • moneyfairy
                  Member
                  • Jun 2013
                  • 14
                  • USA

                  #9
                  Re: Samsung syncmaster 245BW no power at all

                  Alright i will try getting all the glue stuff off, and pick up a multimeter to test the big cap and some of the resistors.

                  Comment

                  • euromatlox
                    Senior Member
                    • Mar 2013
                    • 60
                    • Finland

                    #10
                    Re: Samsung syncmaster 245BW no power at all

                    Google using the board code, BN44-00173A. You will find lots of help. Typical failure is that one of the three 68 ohm resistors is burned. Usually replacing all three resistors and some capacitors will do. Check also the other similar type resistors, I remember once replacing also 100k or 150k resistor (don't remember) too. There is a nice video on youtube about how to fix (I have some comments there also).

                    http://www.youtube.com/watch?v=PCn_aG36Jt0
                    Last edited by euromatlox; 06-21-2013, 01:27 PM.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #11
                      Re: Samsung syncmaster 245BW no power at all

                      Lots of that here:
                      https://www.badcaps.net/forum/showth...syncmaster+245
                      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

                      • moneyfairy
                        Member
                        • Jun 2013
                        • 14
                        • USA

                        #12
                        Re: Samsung syncmaster 245BW no power at all

                        I got a little cheap (non digital) multimeter from a friend. Tested all the capacitors with the resistance setting. They all show open except 2 of them, they show that they have quite a bit of resistance. Could this be whats causing the problem?

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: Samsung syncmaster 245BW no power at all

                          I read the thread, did the two fuses also blow?
                          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

                          • moneyfairy
                            Member
                            • Jun 2013
                            • 14
                            • USA

                            #14
                            Re: Samsung syncmaster 245BW no power at all

                            The fuses dont look like they blew but when i use the multimeter it says there's no current going through them. Which i did order new fuses (hopefully the right ones).
                            This is the link to the fuses i ordered..
                            http://www.mouser.com/ProductDetail/...MgJi7OAr9W0%3d
                            Last edited by moneyfairy; 06-21-2013, 05:18 PM. Reason: adding fuses

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #15
                              Re: Samsung syncmaster 245BW no power at all

                              What resistance do you get when you measure the fuses using the lowest Ohm mode setting on your meter? No power applied to the board while testing the resistance.
                              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

                              • moneyfairy
                                Member
                                • Jun 2013
                                • 14
                                • USA

                                #16
                                Re: Samsung syncmaster 245BW no power at all

                                Nothing, it doesnt show anything is going through them.

                                Comment

                                • budm
                                  Badcaps Legend
                                  • Feb 2010
                                  • 40746
                                  • USA

                                  #17
                                  Re: Samsung syncmaster 245BW no power at all

                                  Here is the diagram for the board.
                                  Attached Files
                                  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

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