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Dell E5440 completely dead, no LED.

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    #21
    Re: Dell E5440 completely dead, no LED.

    Originally posted by Andreasbest View Post
    *Correction PL301 has 17V in both sides
    Pin 7 of PU51 has 0,25V
    What is the voltage on pin5 of pu301?? PR426-voltage on both sides??
    Last edited by mcplslg123; 10-11-2019, 02:29 AM.

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      #22
      Re: Dell E5440 completely dead, no LED.

      PU301 pin5 = 17v
      PR426 = 17v on both sides

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        #23
        Re: Dell E5440 completely dead, no LED.

        Search schematic with +PWR_SRC and check every point. It should be 19V whereas you are having 17V. You need to findout where it is dropping from 19V to 17V. Have you replaced charger IC??

        Btw, You flashed bios??

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          #24
          Re: Dell E5440 completely dead, no LED.

          No i haven't replace anything and i can't flash any bios since it's completely dead.

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            #25
            Re: Dell E5440 completely dead, no LED.

            Originally posted by Andreasbest View Post
            No i haven't replace anything and i can't flash any bios since it's completely dead.
            You dont have a bios programmer??

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              #26
              Re: Dell E5440 completely dead, no LED.

              To be honest no i don't, never needed one before. Do you believe the volatage problem is occured by corrupted bios?

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                #27
                Re: Dell E5440 completely dead, no LED.

                Originally posted by Andreasbest View Post
                To be honest no i don't, never needed one before. Do you believe the volatage problem is occured by corrupted bios?
                Yes, its possible. I strongly suggest to buy one bios programmer. You can consider CH34A if you dont want to spend a whole lot of money. Its dirt cheap and it works well.

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                  #28
                  Re: Dell E5440 completely dead, no LED.

                  Is this ok?
                  https://www.ebay.com/itm/EEPROM-BIOS...513?nav=SEARCH

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                    #29
                    Re: Dell E5440 completely dead, no LED.

                    yeh, that will do the job.

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                      #30
                      Re: Dell E5440 completely dead, no LED.

                      Ok, i'll buy it and when it arrives i'll bump the thread to continue.
                      Thank you very much!

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                        #31
                        Re: Dell E5440 completely dead, no LED.

                        Hello again.
                        U2 was dead so i order new, flashed it with U2 bios and replace it but the laptop is still dead.
                        What do you think?

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                          #32
                          Re: Dell E5440 completely dead, no LED.

                          Hi everyone i have a same issue but my case i have 0,50v in PL51 and +PWR_SRC IS 0,5v witch componement must cheeck?
                          thanks

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