Dell E5440 does not turn on

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  • poweron
    Badcaps Veteran
    • May 2019
    • 365
    • italy

    #1

    Dell E5440 does not turn on

    I have another problem with a Dell E5440 VAW30 LA-9832P which is not a sign of life, LED off, I checked + 3.3V_ALW and + 5V_ALW are present, but I noticed that it is missing + 5_RUN and the + 3.3V_RUN size 1.09v on U46 on this the RUN_ON and SIO_SLP_S3 # signals are missing and also on U45 and U43 missing also + 3.3V_M which feeds the two bios U1 and U2
    Last edited by poweron; 06-02-2019, 06:55 PM.
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    Re: Dell E5440 does not turn on

    Check kbc for basic requirement first. Rsm_RST & LID_SW present??

    Comment

    • poweron
      Badcaps Veteran
      • May 2019
      • 365
      • italy

      #3
      Re: Dell E5440 does not turn on

      hello, I'm sorry but I can't find them, what pins are they?

      Comment

      • poweron
        Badcaps Veteran
        • May 2019
        • 365
        • italy

        #4
        Re: Dell E5440 does not turn on

        these signals are not written on the KBC
        Attached Files

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india

          #5
          Re: Dell E5440 does not turn on

          You can measure rsm_rst on U41/42

          Comment

          • mcplslg123
            Badcaps Legend
            • Jun 2015
            • 7262
            • india

            #6
            Re: Dell E5440 does not turn on

            Lid signal perhaps is on daugther board in this mb.

            Comment

            • Techtiger
              Badcaps Legend
              • Oct 2014
              • 1601
              • france

              #7
              Re: Dell E5440 does not turn on

              Check also PS_ID , ACAV_ID(ACOK)

              Comment

              • poweron
                Badcaps Veteran
                • May 2019
                • 365
                • italy

                #8
                Re: Dell E5440 does not turn on

                Originally posted by mcplslg123
                Lid signal perhaps is on daugther board in this mb.
                RSM_RST = 3.3v is present on pin 3 of U41 and on pin 2 of U42

                Comment

                • poweron
                  Badcaps Veteran
                  • May 2019
                  • 365
                  • italy

                  #9
                  Re: Dell E5440 does not turn on

                  Originally posted by mcplslg123
                  You can measure rsm_rst on U41/42
                  RSM_RST = 3.3v is present on pin 3 of U41 and on pin 2 of U42

                  Comment

                  • poweron
                    Badcaps Veteran
                    • May 2019
                    • 365
                    • italy

                    #10
                    Re: Dell E5440 does not turn on

                    Originally posted by techtiger
                    Check also PS_ID , ACAV_ID(ACOK)
                    PS_ID is present 3.1v ACAV_ID cannot find it there is ACAV_IN and is not present

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                    • Techtiger
                      Badcaps Legend
                      • Oct 2014
                      • 1601
                      • france

                      #11
                      Re: Dell E5440 does not turn on

                      PU402 pin5 is ACOK the same signal goes to SIO KBC & check POWER_SW#_MB 3.3V (# =high low) when pressing Power this will go to 0V and come back to 3.3V ,POWER_SW_IN# 3.3V after R329 test #, make sure RTC_CELL for no short
                      Last edited by Techtiger; 06-04-2019, 02:24 AM.

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                      • poweron
                        Badcaps Veteran
                        • May 2019
                        • 365
                        • italy

                        #12
                        Re: Dell E5440 does not turn on

                        ACOK is present on pin 5 of PU402, pressing power on / off button POWER_SW # _MB from 3.3 goes to 0v and returns to 3.3v

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                        • Techtiger
                          Badcaps Legend
                          • Oct 2014
                          • 1601
                          • france

                          #13
                          Re: Dell E5440 does not turn on

                          What about POWER_SW_IN# 3.3V after R329 test #,RTC_CELL for no short?

                          Comment

                          • EP3RROR
                            Member
                            • Jun 2015
                            • 13
                            • Ελλάδα

                            #14
                            Re: Dell E5440 does not turn on

                            had a board with the same problem. i had put it aside for a couple of months as it needed a new lcd and when i tried to power it on , no power at all. voltages where present. i reprogrammed both bios chips but still nothing.

                            Comment

                            • poweron
                              Badcaps Veteran
                              • May 2019
                              • 365
                              • italy

                              #15
                              Re: Dell E5440 does not turn on

                              + RTC_CELL is present = 3.1v I cannot find the R329 on the board, the names of the resistors and capacitors are not written

                              Comment

                              • Techtiger
                                Badcaps Legend
                                • Oct 2014
                                • 1601
                                • france

                                #16
                                Re: Dell E5440 does not turn on

                                Originally posted by poweron
                                + RTC_CELL is present = 3.1v I cannot find the R329 on the board, the names of the resistors and capacitors are not written
                                to find the resistors and capacitors you have to do a continuity test multimeter find out PCH_RTCRST , AC_PRESENT ,+3.3V_ALW_PCH, when you press power find out any Voltage change SIO SLP S3/S4
                                Last edited by Techtiger; 06-04-2019, 09:12 AM.

                                Comment

                                • poweron
                                  Badcaps Veteran
                                  • May 2019
                                  • 365
                                  • italy

                                  #17
                                  Re: Dell E5440 does not turn on

                                  AC_PRESENT is present, 3.3v , + 3.3V_ALW_PCH = 0v, PCH_RTCRST I can't measure, SIO_SLP_S3 / 4 is always 0v also pressing power button

                                  Comment

                                  • Techtiger
                                    Badcaps Legend
                                    • Oct 2014
                                    • 1601
                                    • france

                                    #18
                                    Re: Dell E5440 does not turn on

                                    Originally posted by poweron
                                    AC_PRESENT is present, 3.3v , + 3.3V_ALW_PCH = 0v, PCH_RTCRST I can't measure, SIO_SLP_S3 / 4 is always 0v also pressing power button
                                    Try to flash Bios but save the old Dump

                                    Comment

                                    • poweron
                                      Badcaps Veteran
                                      • May 2019
                                      • 365
                                      • italy

                                      #19
                                      Re: Dell E5440 does not turn on

                                      should I flash U1 and U2? I saw several files, do you know which one is the best surely flickering?

                                      Comment

                                      • poweron
                                        Badcaps Veteran
                                        • May 2019
                                        • 365
                                        • italy

                                        #20
                                        Re: Dell E5440 does not turn on

                                        when I select the file to program a ch341a programmer message comes out: file too long, what to do?
                                        Attached Files

                                        Comment

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