Hp elitebook 840 g5 bios password

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  • m.sabry2110
    Senior Member
    • Oct 2017
    • 129
    • egypt

    #321
    Originally posted by motanya
    Serial Number : 5CG8494FHJ
    Description : HP EliteBook 840 G5
    Password unlok​
    try
    Attached Files

    Comment

    • bibi019
      Senior Member
      • Jun 2014
      • 54
      • algeria

      #322
      Hi all i need clean file for tHis bios dump Hp elitebook 840 g5. i5 8 generation sn 5CG92229D3
      yours
      emergency
      Attached Files

      Comment

      • hoaca388
        Badcaps Legend
        • Jan 2022
        • 11131
        • Viet Nam

        #323
        Originally posted by bibi019
        Hi all i need clean file for tHis bios dump Hp elitebook 840 g5. i5 8 generation sn 5CG92229D3
        yours
        emergency
        HP EliteBook 840 G5 Base Model Notebook PC
        Attached Files


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        Comment

        • bibi019
          Senior Member
          • Jun 2014
          • 54
          • algeria

          #324
          tHanks for tHe replay but tHe bios still locked it ask always for bios administrator password any Help

          Comment

          • motanya
            Senior Member
            • Nov 2021
            • 158
            • Kenya

            #325
            Originally posted by m.sabry2110

            try
            Worked, thank you

            Comment

            • rddube
              Aspiring Expert
              • Jun 2013
              • 907
              • Canada

              #326
              Hello everyone, need help in Bios unlocking this Lenovo 840 G5. I tried with the HP unlock tool on the larger Bios chip but it didn't work. So I am uploading both bios chips could anyone remove the bios lock? Many thanks!
              Attached Files

              Comment

              • peste
                Super Moderator
                • Dec 2016
                • 12224
                • ROMANIA

                #327
                Originally posted by rddube
                Hello everyone, need help in Bios unlocking this Lenovo 840 G5. I tried with the HP unlock tool on the larger Bios chip but it didn't work. So I am uploading both bios chips could anyone remove the bios lock? Many thanks!
                try.. The 16 MB one remains the same.HP 840 G5 originaldvvdd_unlocked.rar
                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

                • rddube
                  Aspiring Expert
                  • Jun 2013
                  • 907
                  • Canada

                  #328
                  Originally posted by peste

                  try.. The 16 MB one remains the same.[ATTACH]n3523431[/ATTACH]
                  Hi Peste, no that didn't work this is the screen I get when hitting F10
                  Attached Files

                  Comment

                  • rddube
                    Aspiring Expert
                    • Jun 2013
                    • 907
                    • Canada

                    #329
                    Not sure if this is important, but when I boot and press F10, before getting the Bios Administrator Password screen, I get this screen which say PROPERTY OF GHD then the HP logo and then the message Protected by HP Sure Start.

                    I tried looking for the string "PROPERTY OF GHD" in both the 16MB and 32MB files but did not find anything. Not sure what to try next?
                    Attached Files

                    Comment

                    • rddube
                      Aspiring Expert
                      • Jun 2013
                      • 907
                      • Canada

                      #330
                      Ok, so figured it out and will post the solution in case someone has the same issue. Unlocking the 32MB file did not to the trick. Used RcUnlocker on the 16MB chip and that did the trick it is now unlocked. Many thanks to all of you and thanks Peste!

                      Comment

                      • madmanaic73
                        New Member
                        • Jan 2025
                        • 4
                        • Sweden

                        #331
                        Hi everyone,
                        I have a HP 840 G5 that is admin password locked (abandoned from a company). I have been trying a good way to unlock it and reading up on almost the entire thread here it seems reading out the 32MB chip patching it with RCUnlocker is what most people say. I did this (was a Winbond 25Q256JVEQ chip) and to my surprise RCUnlocker told me that the 32MB file was not compatible and I should try a 16MB file. My two questions to anyone who could bring more insight:

                        1. Is RCUnlocker indeed not compatible with 32MB BIOS files? It seems a lot of people have run it successfully
                        2. Is it so that SOME 840 G5 are password locked in the 32MB BIOS and others in the 16MB? It seems very inconcistent.

                        Thanks in advance!

                        Comment

                        • rddube
                          Aspiring Expert
                          • Jun 2013
                          • 907
                          • Canada

                          #332
                          Originally posted by madmanaic73
                          Hi everyone,
                          I have a HP 840 G5 that is admin password locked (abandoned from a company). I have been trying a good way to unlock it and reading up on almost the entire thread here it seems reading out the 32MB chip patching it with RCUnlocker is what most people say. I did this (was a Winbond 25Q256JVEQ chip) and to my surprise RCUnlocker told me that the 32MB file was not compatible and I should try a 16MB file. My two questions to anyone who could bring more insight:

                          1. Is RCUnlocker indeed not compatible with 32MB BIOS files? It seems a lot of people have run it successfully
                          2. Is it so that SOME 840 G5 are password locked in the 32MB BIOS and others in the 16MB? It seems very inconcistent.

                          Thanks in advance!
                          Read the previous post to yours. I mistakenly reported it as a Lenovo 840 G5 but it is an HP 840 G5. Good luck!
                          Last edited by rddube; 01-27-2025, 09:11 PM.

                          Comment

                          • madmanaic73
                            New Member
                            • Jan 2025
                            • 4
                            • Sweden

                            #333
                            Originally posted by rddube

                            Read the previous post to yours. I mistakenly reported it as a Lenovo 840 G5 but it is an HP 840 G5. Good luck!
                            That is what led up to these questions, I suspect you are right, but in other replies in this thread it is clearly stated to be the 32Mb chip that should be patched (which seems impossible to me using RCUnlocker). Seems a bit inconsistent and would be interesting to understand if this is different in different versions of the 840 G5.

                            Comment

                            • madmanaic73
                              New Member
                              • Jan 2025
                              • 4
                              • Sweden

                              #334
                              rddube I was hoping to not have to desolder the 16MB chip (since I successfully connected to the 32Mb using wires). Just to double check: How did you connect to the 16Mb chip? Desolder? Clip? Wires? It seems that with wires my flash device says (no connection to IC) and at the same time a LED is flashing yellow on the motherboard (probably powered backwards from the chip flasher).

                              Comment

                              • rddube
                                Aspiring Expert
                                • Jun 2013
                                • 907
                                • Canada

                                #335
                                Originally posted by madmanaic73
                                rddube I was hoping to not have to desolder the 16MB chip (since I successfully connected to the 32Mb using wires). Just to double check: How did you connect to the 16Mb chip? Desolder? Clip? Wires? It seems that with wires my flash device says (no connection to IC) and at the same time a LED is flashing yellow on the motherboard (probably powered backwards from the chip flasher).
                                The 16mb chip is on the other side of the motherboard, so you are going to take the motherboard out. I always desolder the bios they are so easy to desolder and use one of these attached SOP8 to DIP8 (I have different sizes) and resolder onto the board. You can always use the little board that comes with the CH341 programmer - just make sure you've got pin 1 on pin 1, etc. I never use the clips they are junk as far as I'm concerned.
                                Attached Files

                                Comment

                                • madmanaic73
                                  New Member
                                  • Jan 2025
                                  • 4
                                  • Sweden

                                  #336
                                  OK, so everything worked out just fine, let me share my learnings from this:
                                  1. HP 840 G5 more often that not seems to have password configured in the EC chip on the backside of the motherboard, in my case a Winbond 25Q128JV SMD chip.
                                  2. This chip can't be read or programmed when connected to the motherboard, there seems to be a protection kicking in. Must be desoldered.
                                  3. The chip can easily be read and programmed with CH341A programmer when desoldered, and RCUnlocker worked on the first try.
                                  4. Beware to read more than once and compare readouts, also after programming, read back several times and file compare.
                                  5. Be very careful when resoldering to use enough flux and flow the connecting pins and pads generously.

                                  All in all it worked great, but it was tricky to arrive at this solution due to the contradictory information in this thread. At least this procedure should work for all devices with the same motherboard type than mine.
                                  Thanks rddube for the help to arrive at the right answer.

                                  Comment

                                  • GB1999
                                    Senior Member
                                    • Mar 2023
                                    • 65
                                    • Malaysia

                                    #337
                                    hi, please help me remove the admin lock.
                                    840 g5
                                    sn: 5CG9152N96

                                    THANKS IN ADVANCE
                                    Attached Files

                                    Comment

                                    • SMDFlea
                                      Super Moderator
                                      • Jan 2018
                                      • 20276
                                      • UK

                                      #338
                                      Originally posted by GB1999
                                      hi, please help me remove the admin lock.
                                      840 g5
                                      sn: 5CG9152N96

                                      THANKS IN ADVANCE
                                      Read the post above yours, use RCUnlocker https://www.badcaps.net/forum/troubl...23#post1622423
                                      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                                      Comment

                                      • jiten1885
                                        New Member
                                        • Apr 2021
                                        • 2
                                        • Canada

                                        #339
                                        Looking to remove password from this HP 840 G5 bios.
                                        Attached Files

                                        Comment

                                      • lapfix
                                        Badcaps Legend
                                        • Mar 2020
                                        • 2563
                                        • my workshop

                                        #340
                                        Originally posted by jiten1885
                                        Looking to remove password from this HP 840 G5 bios.
                                        Try and GIVE feedback

                                        First boot load bios factory defaults, save and exit and then at the next boot disable security options
                                        You must fill your DMI manually.​
                                        Attached Files

                                        Comment

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