CR620 (MS-16881) turn on once for 2sec and then die

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  • r ez a
    Member
    • Sep 2014
    • 39
    • iran

    #1

    CR620 (MS-16881) turn on once for 2sec and then die

    hi guys
    i have another weird problem again

    when i plud ac,board turned on immediately,everything is true,even show display,but just for 2sec
    and then it dies
    just +3/5VALW is on

    not respond to power key
    when i press PWR_SW nothing happen on PM_PWR_BTN#
    but when i manually connect PM_PWR_BTN# to GND it turned on for secends and die again
    i program Bios&EC
    i replace KBC but no change

    there is no diffrence with or without cpu

    i hope someone help me
    tnx all
    Attached Files
  • caspian
    Badcaps Legend
    • Oct 2015
    • 1589
    • Laptop

    #2
    Re: CR620 (MS-16881) turn on once for 2sec and then die

    The laptop turns off probably because a RUN voltage is not present after power-on.
    you have to check if all the powergood signals are OK after power-on.
    Specifically, pin17 of KBC.
    However, you have about 2 seconds to check these signals and voltages.

    Comment

    • r ez a
      Member
      • Sep 2014
      • 39
      • iran

      #3
      Re: CR620 (MS-16881) turn on once for 2sec and then die

      problem was here
      PWR_SW# was 0.3V
      i replace R35


      nowPWR_SW#=3.3V and it works

      end of topic
      Attached Files

      Comment

      • String2016
        Badcaps Legend
        • Nov 2015
        • 2229
        • philippines

        #4
        Re: CR620 (MS-16881) turn on once for 2sec and then die

        can you please share the block diagram and boardview for this model please

        Comment

        • r ez a
          Member
          • Sep 2014
          • 39
          • iran

          #5
          Re: CR620 (MS-16881) turn on once for 2sec and then die

          i use MS-168A schematic
          its almost same
          Attached Files

          Comment

          • String2016
            Badcaps Legend
            • Nov 2015
            • 2229
            • philippines

            #6
            Re: CR620 (MS-16881) turn on once for 2sec and then die

            thank you for sharing

            Comment

            • cyberhack
              Badcaps Veteran
              • Feb 2013
              • 466
              • Uk

              #7
              Re: CR620 (MS-16881) turn on once for 2sec and then die

              Here i found this as well
              Attached Files

              Comment

              • guinie
                Member
                • Apr 2021
                • 11
                • Argentina

                #8
                Re: CR620 (MS-16881) turn on once for 2sec and then die

                hi all.... this post is old, but I have some weird failure with same model (MS-1681) Laptop is powering on, everything is fine... then turns off suddenly while is booting up, and after pressing power button nothing happens... I realize that testing it without HDD , booting Windows PE thru USB the laptop keeps on... even I have stressed it with CPU-z and everything is fine... when I put back HDD again goes off... (also tryed with others HDD).. question: Iยดm assuming the issue is on SATA controller or HDD power controller. Someone could share its experience with it ? thank you

                Comment

                • Stevedb
                  Stevedb
                  • Feb 2018
                  • 624
                  • Belgium

                  #9
                  Re: CR620 (MS-16881) turn on once for 2sec and then die

                  i would check the hdd connector for short .

                  Comment

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