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hp elitebook 840 g4 need password unlock

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    Re: hp elitebook 840 g4

    Originally posted by jaggi_32 View Post
    Doesnt work. Blank screen and 5 blinks on power button and caps lock. Checked the soldering, it is soldered well.
    here you are!
    Last edited by SMDFlea; 04-10-2023, 12:39 PM.

    Comment


      Re: hp elitebook 840 g4 need password unlock

      Doesnt work. Caps lock blinking forever.

      Comment


        Re: hp elitebook 840 g4 need password unlock

        Originally posted by jaggi_32 View Post
        Doesnt work. Caps lock blinking forever.
        Re solder the chip carefully , take care if there's resistance near chip
        legs

        Comment


          Re: hp elitebook 840 g4 need password unlock

          Soldering back the chip can be hard sometimes. In fact got some trouble at the beginning to solder it correctly as there were too many tin on the central attachment of the chip on the motherboard. So first remove as much tin as you can from the center, and add more tin to the leads place, then with hot air, solder it back and it should work.
          Regards

          Comment


            Hp 840 g4 bios repair please

            Hi friends. Can someone help me repair corupted bios on Hp elitebook 840 g4. With original bios laptop turn on, but without image on screen, and turn off after about 5 sec.
            When I write other bios from forum, laptop turn on, and image comes with delay of 30 seconds.
            If someone know how to fix that please help.
            I will atach my original old bios.
            Last edited by SMDFlea; 04-10-2023, 12:39 PM.

            Comment


              Re: Hp 840 g4 bios repair please

              Originally posted by sonsy View Post
              Hi friends. Can someone help me repair corupted bios on Hp elitebook 840 g4. With original bios laptop turn on, but without image on screen, and turn off after about 5 sec.
              When I write other bios from forum, laptop turn on, and image comes with delay of 30 seconds.
              If someone know how to fix that please help.
              I will atach my original old bios.
              try..
              Last edited by SMDFlea; 04-10-2023, 12:39 PM.
              Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

              >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

              Every donation made will go towards server fees and maintenance costs.

              Comment


                Re: Hp 840 g4 bios repair please

                Originally posted by peste View Post
                try..
                Thanks neighbor, but with that bios laptop wont turn on, just caps lock blinks..(I try two times)
                Any idea?

                Comment


                  Re: Hp 840 g4 bios repair please

                  Originally posted by sonsy View Post
                  Thanks neighbor, but with that bios laptop wont turn on, just caps lock blinks..(I try two times)
                  Any idea?
                  post the motherboard model ???
                  Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                  >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                  Every donation made will go towards server fees and maintenance costs.

                  Comment


                    Re: Hp 840 g4 bios repair please

                    Originally posted by peste View Post
                    post the motherboard model ???
                    I am not shure where is located, I found some m/b number under second ram module. 11/3 M/B SPS 917504-601

                    Comment


                      Re: Hp 840 g4 bios repair please

                      Originally posted by sonsy View Post
                      I am not shure where is located, I found some m/b number under second ram module. 11/3 M/B SPS 917504-601

                      look for something like this .. written on the motherboard with paint ..


                      6050A2854301-MB-A01
                      Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                      >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                      Every donation made will go towards server fees and maintenance costs.

                      Comment


                        Re: Hp 840 g4 bios repair please

                        Here is motherboard number: 6050A2854301-MB-A01
                        Same is like you wrote.

                        Comment


                          Re: Hp 840 g4 bios repair please

                          Originally posted by sonsy View Post
                          Here is motherboard number: 6050A2854301-MB-A01
                          Same is like you wrote.
                          try..if it works enter the DMI information ..
                          Last edited by SMDFlea; 04-10-2023, 12:39 PM.
                          Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                          >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                          Every donation made will go towards server fees and maintenance costs.

                          Comment


                            Re: Hp 840 g4 bios repair please

                            Originally posted by peste View Post
                            try..if it works enter the DMI information ..
                            Not work

                            will not turn on at all, just caps lock blinks...

                            Comment


                              Re: Hp 840 g4 bios repair please

                              Originally posted by sonsy View Post
                              Not work

                              will not turn on at all, just caps lock blinks...
                              How many times do the caps blink.Clean the gold RAM pins with an eraser.
                              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                              Comment


                                Re: Hp 840 g4 bios repair please

                                Originally posted by SMDFlea View Post
                                How many times do the caps blink.Clean the gold RAM pins with an eraser.
                                Thanks for answer. 8 times blink, When i put bios from forum i got the image on screen, but after delay about 30 sec..
                                Here is dump from forum:
                                Last edited by SMDFlea; 04-10-2023, 12:39 PM.

                                Comment


                                  Re: Hp 840 g4 bios repair please

                                  Try this one .
                                  Attached Files
                                  All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                                  Comment


                                    Re: Hp 840 g4 bios repair please

                                    Originally posted by SMDFlea View Post
                                    Try this one .
                                    BINGO
                                    Works great! You are the king!
                                    Thanks a lot for the effort!
                                    Last edited by sonsy; 11-02-2020, 10:01 AM.

                                    Comment


                                      Re: Hp 840 g4 bios repair please

                                      Originally posted by peste View Post
                                      try..if it works enter the DMI information ..
                                      Thanks also a lot for the effort.
                                      This forum is full of wonderful people who want to help. I was very surprised, how quickly the answers and solutions to the problems arrive.
                                      Thank you all!

                                      Comment


                                        Re: hp elitebook 840 g4 need password unlock

                                        Hi,

                                        Can i remove the password myself, i have ch341a programmer. Regards

                                        Comment


                                          Re: hp elitebook 840 g4 need password unlock

                                          Originally posted by sade8788 View Post
                                          Hi,

                                          Can i remove the password myself, i have ch341a programmer. Regards
                                          Yes that's the point, with ch341a, you should read & save your locked firmware, post it here, and the community will repost a firmware without password. Download it and reprogram it. Then solder it back (so yeah you will need to remove the chip from motherboard before).
                                          Regards

                                          Comment

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