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
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    • ktmmotocross
      Boardkiller
      • Feb 2014
      • 3586
      • 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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