Wistron JE70-CP MB - turns off after 32 sec.

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  • GlobalPlayer
    New Member
    • Nov 2019
    • 3
    • Germany

    #1

    Wistron JE70-CP MB - turns off after 32 sec.

    Hi together,
    I am new at this forum and just for learning an understanding i took this old mainboard from a 17" Packard Bell Laptop.
    Battery is dead and I run it with a power adapter only.
    It turns on, I get image on the the screen, fans start running and I can enter bios or bootmenü (I removed the hdd). After exactly 32 seconds it turns off and I can start over again.
    I checked it with a stop watch, every time exactly 32 seconds, doesn't look like a faulty cap or something like this to me.
    More than a system check fails at the same stage but when I can enter bios or bootmenu the system check should already be completed, right ?
    i removed both RAM-Modules, tried with only one or the other, i applied new heat sink and replaced the 3V Button Cell, same result.
    In the schematics I found sheet 43 (Run Power) and measured some voltages but I have no idea what can cause the system shut down.
    Some hints for me ?
    Thanks a lot in advance

    GP
    Attached Files
  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3581
    • slovakia

    #2
    Re: Wistron JE70-CP MB - turns off after 32 sec.

    clean bios me

    Comment

    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india

      #3
      Re: Wistron JE70-CP MB - turns off after 32 sec.

      Check U55 ic.

      Comment

      • GlobalPlayer
        New Member
        • Nov 2019
        • 3
        • Germany

        #4
        Re: Wistron JE70-CP MB - turns off after 32 sec.

        Thank you mcplslg123, that was Bullseye !
        U55 was the culprit (or one of the external temp.sensors).
        I couldn't find out which one but most likely GPU-Sensor.
        So i lifted up the DXP3 leg of U55 and and tried what happens.
        You know what ...it stays on.
        Fan turns on and off, everything looks ok.
        Thanks again and a happy new year !!

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india

          #5
          Re: Wistron JE70-CP MB - turns off after 32 sec.

          Glad you fixed it. happy new year to you mate.

          Comment

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