Asus X53U: Instantly Cuts Off

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  • speedypro
    Badcaps Veteran
    • Feb 2013
    • 561
    • United Kingdom

    #21
    Re: Asus X53U: Instantly Cuts Off

    Originally posted by fddizon
    check pc222 and all caps along that line... doyou see it? pc222 line going down maybe more parts along that line

    can u post the schematic?
    Its in PDF. Can I do that? But here is a bigger picture:



    EDIT:

    PC222: No caps reading. Is that cap bad?

    Also, pin 2 of pl202 is still short to ground.
    Attached Files
    Last edited by speedypro; 07-17-2013, 08:12 AM.
    Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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    • fddizon
      Badcaps Veteran
      • Sep 2011
      • 555
      • Philippines

      #22
      Re: Asus X53U: Instantly Cuts Off

      remove pr217 and retest
      still short?
      find +APU_CORE_NB
      short gone, proceed - check PC 223
      if pc223 ok, follow that line
      Last edited by fddizon; 07-17-2013, 12:54 PM.

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      • speedypro
        Badcaps Veteran
        • Feb 2013
        • 561
        • United Kingdom

        #23
        Re: Asus X53U: Instantly Cuts Off

        Originally posted by fddizon
        ...
        find +APU_CORE_NB
        ...
        Now that is the part I cannot locate. What is that?
        Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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        • Francisco.s
          Badcaps Veteran
          • Jan 2013
          • 686
          • Spain

          #24
          Re: Asus X53U: Instantly Cuts Off

          When you say pin 2 is short, are you saying short= zero ohms?
          If there are more than 1 ohm, then 99 per cent sure the circuit is good.
          These low ohms is due to the high amperage the circuit eats.

          Comment

          • fddizon
            Badcaps Veteran
            • Sep 2011
            • 555
            • Philippines

            #25
            Re: Asus X53U: Instantly Cuts Off

            Originally posted by speedypro
            Now that is the part I cannot locate. What is that?
            just use adobe readers find bro. press ctrl + f then type this +APU_CORE_NB

            press enter until you find what are you looking for with the schematic

            regards

            Comment

            • speedypro
              Badcaps Veteran
              • Feb 2013
              • 561
              • United Kingdom

              #26
              Re: Asus X53U: Instantly Cuts Off

              Originally posted by Francisco.s
              When you say pin 2 is short, are you saying short= zero ohms?
              No. I mean when tested to ground.

              Originally posted by fddizon
              just use adobe readers find bro. press ctrl + f then type this +APU_CORE_NB

              press enter until you find what are you looking for with the schematic

              regards
              That shows nothing. Does not show the source. I have attached the schematic.
              Attached Files
              Last edited by speedypro; 07-19-2013, 05:14 AM.
              Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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              • speedypro
                Badcaps Veteran
                • Feb 2013
                • 561
                • United Kingdom

                #27
                Re: Asus X53U: Instantly Cuts Off

                To partially wrap things up, I have removed the CPU, since that is the APU. On removing and testing the + side of the cap (PC218) or PL202 to ground, there is no more sort so it's clear that a reball of the CPU is needed. I'll confirm within two weeks as we need the EME450GBB22GV reballing stencil from e-best.



                When I say short, I mean setting the multimeter to diode or continuous; like testing a fuse.




                Many thanks for all the effort and support guys.
                Attached Files
                Last edited by speedypro; 07-19-2013, 10:25 AM.
                Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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                • Francisco.s
                  Badcaps Veteran
                  • Jan 2013
                  • 686
                  • Spain

                  #28
                  Re: Asus X53U: Instantly Cuts Off

                  When I say short, I mean setting the multimeter to diode or continuous; like testing a fuse.
                  You must set the multimeter to ohms, then probably you can read 4 or more ohms, what is perfectly right.

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                  • speedypro
                    Badcaps Veteran
                    • Feb 2013
                    • 561
                    • United Kingdom

                    #29
                    Re: Asus X53U: Instantly Cuts Off

                    I did set it to ohms setting and it read 0.2 ohms. I haven't tested in ohms setting while cpu chip was off. I'll see what it reads tomorrow at work.
                    Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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                    • Francisco.s
                      Badcaps Veteran
                      • Jan 2013
                      • 686
                      • Spain

                      #30
                      Re: Asus X53U: Instantly Cuts Off

                      Originally posted by speedypro
                      I did set it to ohms setting and it read 0.2 ohms. I haven't tested in ohms setting while cpu chip was off. I'll see what it reads tomorrow at work.
                      No doubt, there is a short-circuit.

                      Comment

                      • speedypro
                        Badcaps Veteran
                        • Feb 2013
                        • 561
                        • United Kingdom

                        #31
                        Re: Asus X53U: Instantly Cuts Off

                        While cpu chip is still off, all coils now have high values in Ω so it's perfectly clear that the cpu was the culprit. I'll update when I receive the stencil for the reball.
                        Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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                        • Th3_uN1Qu3
                          Believe in
                          • Jul 2010
                          • 6031
                          • Romania

                          #32
                          Re: Asus X53U: Instantly Cuts Off

                          Measure all caps on top of the APU chip before attempting to reball it, the chip could be dead. If any read short (under 1 ohm), the chip is busted.

                          I used to have one of those APUs on my keychain until it broke and fell off - it was dead short. Came from a Sony Vaio that took a very heavy fall, and there was no plastic foil between the sides of the chip. Due to the impact, the heatsink hit the caps and shorted them out while the laptop was running, and killed the chip.
                          Last edited by Th3_uN1Qu3; 07-21-2013, 08:19 AM.
                          Originally posted by PeteS in CA
                          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                          A working TV? How boring!

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                          • speedypro
                            Badcaps Veteran
                            • Feb 2013
                            • 561
                            • United Kingdom

                            #33
                            Re: Asus X53U: Instantly Cuts Off

                            Originally posted by Th3_uN1Qu3
                            Measure all caps on top of the APU chip before attempting to reball it, the chip could be dead. If any read short (under 1 ohm), the chip is busted.

                            I used to have one of those APUs on my keychain until it broke and fell off - it was dead short. Came from a Sony Vaio that took a very heavy fall, and there was no plastic foil between the sides of the chip. Due to the impact, the heatsink hit the caps and shorted them out while the laptop was running, and killed the chip.
                            Good tip!! I'll test them tomorrow at work Good thing I'd placed an order for the chip aswel as the stencil
                            Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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                            • speedypro
                              Badcaps Veteran
                              • Feb 2013
                              • 561
                              • United Kingdom

                              #34
                              Re: Asus X53U: Instantly Cuts Off

                              Sorry for the late update. CPU reballed did the trick. Laptop now works.
                              Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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                              • fddizon
                                Badcaps Veteran
                                • Sep 2011
                                • 555
                                • Philippines

                                #35
                                Re: Asus X53U: Instantly Cuts Off

                                congratulations speedypro!!!

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