samsung NP-RV410L that doesnt power up

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  • jonny0404
    Senior Member
    • Nov 2014
    • 110
    • Colombia
    #1

    samsung NP-RV410L that doesnt power up

    HI Guys i have been working on a samsung NP-RV410L that doesnt power up, so using power supply i found something that gets very hot, TPS51125,that chip controls 5 and 3 v always, so i change that chip for the same printed number and it keep getting hot, what can it be.

    tps51125

    VIN-17.94v
    EN- 1.29v
    VREG5-5v
    VREG3-0.83v
    ref-2v
    TONSEL-0.82v
    SKIPSEL-2v

    https://cdn.badcaps-static.com/pdfs/...c3b552ae45.pdf
    Attached Files
    Tags: None
    • dj_ricoh
      Badcaps Legend
      • Jan 2013
      • 2073
      • uk
      #2
      Re: samsung NP-RV410L that doesnt power up

      Vreg3 its 3.3v alw

      You got short there
      Just cook it! It's already broken.

        Comment

        • jonny0404
          Senior Member
          • Nov 2014
          • 110
          • Colombia
          #3
          Re: samsung NP-RV410L that doesnt power up

          HI, i already measure, pin VREG3, to ground and nothing beeps,on the multimeter, how to know where to measure ???

            Comment

            • MDY
              Senior Member
              • Jan 2014
              • 75
              • Spain
              #4
              Re: samsung NP-RV410L that doesnt power up

              Check KBC.

                Comment

                • jonny0404
                  Senior Member
                  • Nov 2014
                  • 110
                  • Colombia
                  #5
                  Re: samsung NP-RV410L that doesnt power up

                  this is is KBC pins, which pins should i measure.
                  Attached Files

                    Comment

                    • whaldsz
                      Badcaps Veteran
                      • Apr 2013
                      • 395
                      • Philippines
                      #6
                      Re: samsung NP-RV410L that doesnt power up

                      also check the BIOS. it gets 3.3v from VREG3.

                        Comment

                        • jonny0404
                          Senior Member
                          • Nov 2014
                          • 110
                          • Colombia
                          #7
                          Re: samsung NP-RV410L that doesnt power up

                          HI guys well i think i found something, that probably someone can tell me if smsc is short, when i power up motherboard if you see the smt2 is a small solder look at that pic please, when is joing into one motherboard doesnt power up, but when i separate that small solder, motherboard lights up, i measure that pin 68, and is good nothing short, i cant find those capasitors , because this board doesnt have anything print in it. i forgot one thing when i power up board with that solder joing, TPS gets hot, is like smsc send a voltage to enable and make TPS hot, TPS is not short.
                          so you guys think something wrong with SMSC.
                          Attached Files
                          Last edited by jonny0404; 03-31-2015, 11:31 AM.

                            Comment

                            • claudyu07
                              Claudyu07
                              • May 2014
                              • 164
                              • Ireland
                              #8
                              Re: samsung NP-RV410L that doesnt power up

                              check mosfets & capacitors close to TPS51125. more than likely one is shorted on VREG3

                                Comment

                                • ibrahim_yas
                                  Banned
                                  • Nov 2015
                                  • 20
                                  • 86159159666
                                  #9
                                  Re: samsung NP-RV410L that doesnt power up

                                  thanks for bios acer d271

                                    Comment

                                    • hardware-tec
                                      New Member
                                      • Aug 2017
                                      • 4
                                      • Argentina
                                      #10
                                      Re: samsung NP-RV410L that doesnt power up

                                      Alguien tiene la Bios de esta Maquina que me pueda facilitar?? Samsung RV410L

                                        Comment

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