Bios unlock for DELL LATITUDE 7420

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Juanjoh2
    New Member
    • Sep 2025
    • 4
    • España

    #481
    Hi!
    I have Dell Latitude 7420 / Service Tag: 1BDP0J3

    Comment

    • peste
      Super Moderator
      • Dec 2016
      • 13436
      • ROMANIA

      #482
      Originally posted by Juanjoh2
      Hi!
      I have Dell Latitude 7420 / Service Tag: 1BDP0J3
      and what is your problem??

      post motherboard model,etc.
      post the contents of the bios chip even if it is corrupted..
      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

      • Juanjoh2
        New Member
        • Sep 2025
        • 4
        • España

        #483
        I have the bios locked. I have forgotten the administrator password.

        Comment

        • LBTT1121
          Badcaps Veteran
          • Nov 2024
          • 735
          • Việt Nam

          #484
          Originally posted by Juanjoh2
          I have the bios locked. I have forgotten the administrator password.
          post the contents of the bios chip even if it is corrupted..

          Comment

          • Juanjoh2
            New Member
            • Sep 2025
            • 4
            • España

            #485
            ok. thanks
            Attached Files

            Comment

            • peste
              Super Moderator
              • Dec 2016
              • 13436
              • ROMANIA

              #486
              Originally posted by Juanjoh2
              ok. thanks
              post the original contents of the bios chip..not the update on the website..
              The bios chip must be unsoldered from the board before writing or reading..
              do not use the clip, you may have errors..if you do not have anything to unsolder it with,
              solder wires between the programmer and the bios chip..

              you need an SPI programmer...here is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow
              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

              • Juanjoh2
                New Member
                • Sep 2025
                • 4
                • España

                #487
                Okay, thanks. I'll try that.

                Comment

                • javivi
                  Member
                  • Jun 2013
                  • 21
                  • spain

                  #488
                  Hi please can you help me to unlock password ? Here is data.

                  Notebook Dell Latitude 7420
                  Motherboard number: LA-K371P REV3.0 A02
                  Service tag: 9L9QKN3

                  Thanks in advance
                  Attached Files

                  Comment

                  • LBTT1121
                    Badcaps Veteran
                    • Nov 2024
                    • 735
                    • Việt Nam

                    #489
                    Originally posted by javivi
                    Hi please can you help me to unlock password ? Here is data.

                    Notebook Dell Latitude 7420
                    Motherboard number: LA-K371P REV3.0 A02
                    Service tag: 9L9QKN3

                    Thanks in advance
                    try and feedback
                    Attached Files

                    Comment

                    • javivi
                      Member
                      • Jun 2013
                      • 21
                      • spain

                      #490
                      Originally posted by LBTT1121

                      try and feedback
                      It worked! Many thanks !!

                      Comment

                      • Skurrrtcobain
                        New Member
                        • Oct 2025
                        • 2
                        • Canada

                        #491
                        Hey boys and gals! i found this little gem for 80 bucks!! Problem is. It's obviously from a guy who was working for a company.. it's Bios admin locked combined with Windows bitlocker so i cannot prompt any cmd or whatsoever and i don't have access to the session password either... i do have a service tag ( expiring next month so its a very recent computer lol!! )

                        i tried a couple things.. but seems like my only option is to change the harddrive and try to find a bios chips and a shop to unsold and solder it from me... Any idea on what i should do?

                        ST: BMNGGK3
                        also it's 8FC8 so not completely lock.. there might be a way !! finger crossed

                        Comment


                        • peste
                          peste commented
                          Editing a comment
                          post merged...next time look for a thread with the name and model, motherboard model of the laptop, and post there, if you can't find it, then make a new thread..
                      • Skurrrtcobain
                        New Member
                        • Oct 2025
                        • 2
                        • Canada

                        #492
                        Dell Latitude 7420 !!! so sorry

                        Comment

                        • peste
                          Super Moderator
                          • Dec 2016
                          • 13436
                          • ROMANIA

                          #493
                          Originally posted by Skurrrtcobain
                          Dell Latitude 7420 !!! so sorry
                          post the contents of the bios chip even if it is corrupted..

                          The bios chip must be unsoldered from the board before writing or reading..
                          do not use the clip, you may have errors..if you do not have anything to unsolder it with,
                          solder wires between the programmer and the bios chip..

                          you need an SPI programmer...here is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow

                          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

                          • trunguntilyou
                            Badcaps Veteran
                            • Aug 2022
                            • 355
                            • Vietnam

                            #494
                            help me the TPM!!
                            sn: BJCM6D3
                            Attached Files

                            Comment

                            • chelsea1155
                              Member
                              • Dec 2014
                              • 33
                              • vietnam

                              #495
                              Good morning, could you please help me remove the computrace from dell Latitude 7420 LA-k371p
                              st: 1HPJKR3
                              THANK YOU SO MUCH
                              Attached Files

                              Comment

                              Related Topics

                              Collapse

                              • Jeff'sTech
                                Dell Latitude 7420 BIOS Unlock Gone Wrong
                                by Jeff'sTech
                                Hello everyone.

                                I have come here with a rather specific question. I was given a Dell Latitude 7420 laptop with a busted screen, and wanted to see if I could refurbish it into my daily driver. I wanted to experiment and see if a 2-in-1 display would work as the chassis of the laptop and 2-in-1 7420 looked identical. I threw in the display and my hypothesis was correct, however, I was greeted with a locked BIOS and since I didn't know the password, I figured I'd try to unlock it somehow. I bought one of those POGO pin probe things for my CH341A programmer so I could read and make...
                                11-08-2023, 03:30 PM
                              • Akhlz001
                                Dell Pro 13 Plus PB13250 Bios Unlock
                                by Akhlz001
                                Hi,

                                Could someone help trying to unlock this BIOS, seems that Dell have changed the layout of new Dell Pro 8FC8 bioses from checking HXD - 4000 bits do not need changing, only 2000. However after FF the section starting from '01000' upto 2000 bits and then soldering the chip back it seems that the microchip on the motherboard is recovering the bios back to original settings after first boot. Has anyone found a way to crack this extra layer of security Dell have implemented? Seems both HP and Dell have upped bios security to match Lenovo by implementing extra measures on a separate...
                                09-20-2025, 07:15 PM
                              • gizaha
                                Dell Latitude 5580 possible bios corruption
                                by gizaha
                                Dell latitude 5580, motherboard cdp 80 la-e151p

                                3 amber 3 white blinks. Dell website sais it's problem "bios recovery" and suggested solution "recovery image not found"
                                (from here https://www.dell.com/support/manuals...e7a&lang=en-us)

                                I try plugging charger while pressing ctrl+esc, machine turns on, nothing and after 20 seconds it gives 3 amber 3 white blinks again.

                                Since ssd is replaced and had clean install windows, i've...
                                02-13-2024, 07:18 AM
                              • Document Archive
                                DELL Latitude 7420 Notebook 7000 Specification for Upgrade or Repair
                                by Document Archive
                                This specification for the DELL Latitude 7420 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 7420 boardview and 7420 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for DELL Latitude 7420...
                                09-07-2024, 01:30 AM
                              • jhanra
                                Dell Latitude 5400 Chromebook UEFI bios
                                by jhanra
                                Hi there masters, recently i got a dell 5400 chromebook and wanted to install windows, i searched the internet and i found out other people also wanting a UEFI bios for this model, i searched there is a R/W legacy, but there are bugs like keyboard/trackpad not working, and hard to install.

                                so i decided to try to port one, this bios is based on dell 5400 windows version, i am testing this bios for a week now an found only a little to no bug at all in windows 10, or only a minor issue
                                in windows 11 sound driver compatibility, but overall its ok, for me i can deal with it, 😅😅😅...
                                11-02-2024, 04:19 AM
                              • Loading...
                              • No more items.
                              Working...