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Asus N550JV wont work from battery

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    Asus N550JV wont work from battery

    Hi laptop doesn't recognize battery but says fully charged ,and wont work from battery ,dont have schematic

    #2
    Re: Asus N550JV wont work from battery

    First make sure you use a good battery.
    If it's a motherboard issue, use the boardview to help you. Check battery MOSFET and current sense resistor (and fuse if there is one).
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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      #3
      Re: Asus N550JV wont work from battery

      Replaced charger IC and all current sense resistor,new battery still same,the lack of schematic is worst nightmare

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        #4
        Re: Asus N550JV wont work from battery

        You need to go back more.
        Dcin and bat+
        Am not looking at shem but somewhere here it tells if adp not present then use battery you need to look here.
        check b+ line.
        check battery pin if giving out 19v,check if that pin is shorted if so then inject 1v and start your amps less then 1 then increase as you go

        what rev is your board
        check
        PU8000
        pin14 is gnd and rest is not so se if other pins beep with gnd
        Attached Files
        Last edited by Stevie2001; 06-17-2018, 06:08 AM.

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          #5
          Re: Asus N550JV wont work from battery

          my board is rev 2.1 ,PU800 is responsible for PPVCORE not for battery ,laptop working ok on charger

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            #6
            Re: Asus N550JV wont work from battery

            It's important to know if the problem regard battery charge voltage or smart battery signal, so check on BAT_CON
            PIN 1_2 -> charge voltage
            PIN 3 -> SMB0_DAT_CLK_CON -> 3.3 v ?
            PIN 4 -> SMB0_DAT_BAT_CON -> 3.3 v ?
            If no voltage on pin 1_2 = charger IC or a signal to it or a mosfet

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              #7
              Re: Asus N550JV wont work from battery

              AC_BAT_SYS shorted now I have to find where

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                #8
                Re: Asus N550JV wont work from battery

                Originally posted by ciki View Post
                AC_BAT_SYS shorted now I have to find where
                Use boardview provided in attachment

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                  #9
                  Re: Asus N550JV wont work from battery

                  It was working with AC adpater so AC_BAT_SYS wasn't shorted.
                  OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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