Acer aspire power on!!!

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  • MIDOX
    Member
    • Jul 2018
    • 32
    • ALGERIA

    #1

    Acer aspire power on!!!

    Hi all
    I want help please
    I have acer laptop motherboard
    Model Name :Q5WV1/Q5WS1 LA-7912P.

    I want to turn on the laptop without power button

    U find 3v in pin number 1 and i want what is short pins make laptop on
  • brew99
    Senior Member
    • Jan 2019
    • 132
    • Canada

    #2
    Re: Acer aspire power on!!!

    Usually 3.3V to Grd to turn on. I don't have the schematic for your device, so can't say exact pin#. There might also be a couple of exposed pads/jumper near the power button connector on the motherboard that you can jumper

    Comment

    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india

      #3
      Re: Acer aspire power on!!!

      Pin#7 is pwrbtn and pin8 is gnd. So shorting between these two pins should turn the mb on if everything else is ok.

      Comment

      • MIDOX
        Member
        • Jul 2018
        • 32
        • ALGERIA

        #4
        Re: Acer aspire power on!!!

        i try to short pin 1 with 2 some times turn on and some times no

        Comment

        • on/off
          Badcaps Veteran
          • Oct 2016
          • 333
          • Indonesia

          #5
          Re: Acer aspire power on!!!
          • When use search, easy to find schematic on badcaps.net forum.
            https://www.badcaps.net/forum/showpo...34&postcount=1
            Want to repair SMD devices without schematic, till you know pin out kbc in your head (expert), then try check contiunity which pin goes to power conn.
          • pin 1 3valw
          • pin 7 on/offbtn#
          • pin 8 gnd
            So you want to make shorted +3valw power rail with LID, lucky you no hurt to mobo. follow suggestion post#3
          • Usually I made an on/off power button from scrap board (touchpad click L/R---or ex power button) and connect to SW1 for help when I'm trouble shoot motherboard. Twizzer NO
          Attached Files
          Last edited by on/off; 01-19-2019, 03:21 AM.

          Comment

          • on/off
            Badcaps Veteran
            • Oct 2016
            • 333
            • Indonesia

            #6
            Re: Acer aspire power on!!!

            [/QUOTE]Maybe your problem on LID IC, check that IC on your power button's board.

            IC package SOT-23-3

            Part | Marking Code | Vendor

            PT3661-BB = 661 Prolific
            EM-6781-T3 ??? AKM
            AH180N = K9 Diodes
            APX9131 = X31X Anpec
            APX9132 = X32X Anpec
            MH248BESO = 248x MST/magnesensor
            OCH1691WAD = 251x ???
            AH9249NTR-G1 = GJ9 Diodes or BCD
            Last edited by on/off; 01-19-2019, 03:43 AM.

            Comment

            • MIDOX
              Member
              • Jul 2018
              • 32
              • ALGERIA

              #7
              Re: Acer aspire power on!!!

              thx for helping problem resolved

              thx badcaps legend <3

              Comment

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