generic laptop no power on except with adapter pluged in

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  • desktop85
    Member
    • Jul 2013
    • 14
    • Venezuela

    #1

    generic laptop no power on except with adapter pluged in

    Hello to everyone, this is a generic chinese laptop, the motherboard part number is c42IIX Main BD REV.01 / 37GC42200-10

    With the charger pluged in the laptop power up and work with total normality, if I unplug the charger with the laptop on it still working with the battery charge for a long time. With the battery totally charged I tried to power it up but the dc adapter unpluged then the laptop won't turn on. I change the battery controller IC OZ8618 but the failure persist. Can someone help me with your wonderful ideas?
  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3558
    • slovakia

    #2
    Re: generic laptop no power on except with adapter pluged in

    bad battery. seen some with same symptoms

    Comment

    • meritosari
      Senior Member
      • Oct 2010
      • 774
      • Indonesia

      #3
      Re: generic laptop no power on except with adapter pluged in

      Originally posted by ktmmotocross
      bad battery. seen some with same symptoms
      Hope schematic can helps
      Attached Files

      Comment

      • desktop85
        Member
        • Jul 2013
        • 14
        • Venezuela

        #4
        Re: generic laptop no power on except with adapter pluged in

        Thanks for the schematics, I don't understand if the battery is damage or working wrong, why when the laptop turn on and I unplug the adapter the laptop still working?. The failure is similar to the Toshiba laptop A305 series with NEC TOKIN

        Comment

        • desktop85
          Member
          • Jul 2013
          • 14
          • Venezuela

          #5
          Re: generic laptop no power on except with adapter pluged in

          I think that I wasn't clear on my first comment. This is the problem, I need to plug the adapter to turn on the laptop, then if I want I can unplug the adapter and the laptop still working with the battery charge without problem. But if I turn it off the laptop won't turn on with only the battery, I need to plug the adapter again turn it on and then I can unplug the adapter again and still working with the remaining charge

          Comment

          • desktop85
            Member
            • Jul 2013
            • 14
            • Venezuela

            #6
            Re: generic laptop no power on except with adapter pluged in

            I use the adapter like some kind of starter XD

            Comment

            • mcplslg123
              Badcaps Legend
              • Jun 2015
              • 7262
              • india

              #7
              Re: generic laptop no power on except with adapter pluged in

              Voltage at pin 15 of pu4?? Check schematic page 29. Some kind of fault likely to be here.

              Comment

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