Weird Problem with Zenbook UX31la

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  • maxoscar
    Member
    • Apr 2015
    • 10
    • syria
    #1

    Weird Problem with Zenbook UX31la

    Hello,

    I have the below strange problem with Zenbook UX31LA :

    -If the battery is connected, The laptop boot up using the battery mode regardless if the AC charger is being plugged in or off.

    -The laptop could power up using the AC charger if the battery is disconnected,

    The only way to let them both work together is to follow the below sequence :

    1- Disconnecting the battery.
    2-Booting up using the AC charger.
    3-While the laptop is working, connecting the battery again (I know this is unsafe but this is the only way)

    I have updated the BIOS , but the problem hasn't been solved.

    Please Advice


    Thanks in advance
    Last edited by maxoscar; 04-06-2017, 10:32 AM.
    Tags: None
    • cacla
      Badcaps Veteran
      • Apr 2015
      • 442
      • /
      #2
      Re: Weird Problem with Zenbook UX31la

      You have problem with first or second mosfet form DC pin. Today i have the same problem.
      Last edited by cacla; 04-06-2017, 11:27 AM.

        Comment

        • maxoscar
          Member
          • Apr 2015
          • 10
          • syria
          #3
          Re: Weird Problem with Zenbook UX31la

          Hello again and thanks for your answer

          would you please help me how could I find the suitable mosfet (Number ) ?

            Comment

            • cacla
              Badcaps Veteran
              • Apr 2015
              • 442
              • /
              #4
              Re: Weird Problem with Zenbook UX31la

              First measure which one is faulty

                Comment

                • maxoscar
                  Member
                  • Apr 2015
                  • 10
                  • syria
                  #5
                  Re: Weird Problem with Zenbook UX31la

                  Sorry for the dumb question as I am a newbie in this field, which is the better way to test the MOSFET:
                  - check if there is a shortage between the MOSFET's legs. Also between MOSFET's leg and the ground.
                  - while the laptop power on, check the input and output on the MOSFETS' leg 19v

                  are the above steps are the correct procedure, Thanks

                    Comment

                    • maxoscar
                      Member
                      • Apr 2015
                      • 10
                      • syria
                      #6
                      Re: Weird Problem with Zenbook UX31la

                      Any idea?

                        Comment

                        • ktmmotocross
                          Boardkiller
                          • Feb 2014
                          • 3577
                          • slovakia
                          #7
                          Re: Weird Problem with Zenbook UX31la

                          every way is good. more measuring data, more u know for repair

                            Comment

                            • maxoscar
                              Member
                              • Apr 2015
                              • 10
                              • syria
                              #8
                              Re: Weird Problem with Zenbook UX31la

                              Originally posted by cacla
                              You have problem with first or second mosfet form DC pin. Today i have the same problem.
                              Hello again

                              I have checked the mosfet today with multi-meter and there is a shortage in the mosfet between the drain and the source . How could I purchase a substitute item.

                              Thanks in advance

                                Comment

                                • maxoscar
                                  Member
                                  • Apr 2015
                                  • 10
                                  • syria
                                  #9
                                  Re: Weird Problem with Zenbook UX31la

                                  Any idea, please ?

                                    Comment

                                    • rtstorm
                                      Badcaps Veteran
                                      • Feb 2012
                                      • 971
                                      • Croatia
                                      #10
                                      Re: Weird Problem with Zenbook UX31la

                                      Do you have a schematics? If yes then read value for that fet, or use a magifierband read the text from mosfet
                                      ...the quieter you become the more you are able to hear...

                                        Comment

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