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    HP Elitebook 840 G5 Black Screen

    Hey there,

    I have got a HP Elitebook from a friend. It just starts with a black screen and loud fan. He tried to unlock the BIOS. Strangely I can't get 2 same reads out of the 32 MB Chip.
    If I put another Chip in I can read and write on it without any problems. So I suggest it is a bad chip.
    I only got a faulty readout of the 32 MB. The original dump and the one that was flashed is sadly gone forever. But maybe someone can make a working image again out of it?

    Thanks a lot in advance

    filewalker
    Attached Files

    #2
    Re: HP Elitebook 840 G5 Black Screen

    Attached Files

    Comment


      #3
      Re: HP Elitebook 840 G5 Black Screen

      Originally posted by filewalker View Post
      Hey there,

      I have got a HP Elitebook from a friend. It just starts with a black screen and loud fan. He tried to unlock the BIOS. Strangely I can't get 2 same reads out of the 32 MB Chip.
      If I put another Chip in I can read and write on it without any problems. So I suggest it is a bad chip.
      I only got a faulty readout of the 32 MB. The original dump and the one that was flashed is sadly gone forever. But maybe someone can make a working image again out of it?

      Thanks a lot in advance

      filewalker

      I have rebuilt your original bios, write both chips with these files and copy the result.
      Attached Files

      Comment


        #4
        Re: HP Elitebook 840 G5 Black Screen

        Thank you aboumohamed and aldopc,

        I tried your files and they did not work. I still get a black screen with the fan spinning.
        I had to replace the 32 MB Chip since I was not able to read/write on the old one.

        Comment


          #5
          Re: HP Elitebook 840 G5 Black Screen

          Originally posted by filewalker View Post
          Thank you aboumohamed and aldopc,

          I tried your files and they did not work. I still get a black screen with the fan spinning.
          I had to replace the 32 MB Chip since I was not able to read/write on the old one.
          HP EliteBook 840 G5 Base Model Notebook PC
          Attached Files
          Last edited by hoaca388; 02-16-2023, 09:56 AM.


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          Comment


            #6
            Re: HP Elitebook 840 G5 Black Screen

            Originally posted by filewalker View Post
            Thank you aboumohamed and aldopc,

            I tried your files and they did not work. I still get a black screen with the fan spinning.
            I had to replace the 32 MB Chip since I was not able to read/write on the old one.
            What programmer do you use? I think you have a problem with that...

            Comment


              #7
              Re: HP Elitebook 840 G5 Black Screen

              Originally posted by aldopc View Post
              What programmer do you use? I think you have a problem with that...
              I have a CH341A Programmer. Not the best and I am planning to buy a better one, but in the meantime I have just flashed 8x 840 G3. And with the new chip I was able to perform a proper write and read. I think the friend who tried to unlock it did more damage to it doing so.

              Comment


                #8
                Hp 840 g5 bios corrupt help!!

                Help with corrupt bios Hp 840 g5,fan spin no display. I add orig bios.
                ID:3jx64ea#ak8
                SN:5cg83562sz

                Thanks.
                Attached Files

                Comment


                  #9
                  Re: HP Elitebook 840 G5 Black Screen

                  Anyone to help!!!

                  thanks

                  Comment


                    #10
                    Re: Hp 840 g5 bios corrupt help!!

                    Originally posted by cvejas View Post
                    Help with corrupt bios Hp 840 g5,fan spin no display. I add orig bios.
                    ID:3jx64ea#ak8
                    SN:5cg83562sz

                    Thanks.
                    Here's your New BIOS, try it and let me know.
                    Attached Files
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                    see the donate button at the bottom of the page, or
                    >>>>>
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                    Comment


                      #11
                      Re: HP Elitebook 840 G5 Black Screen

                      I'll try and let you know.

                      Thanks

                      Comment


                        #12
                        Re: HP Elitebook 840 G5 Black Screen

                        I try new bios,not working.Fan spin max,no display.

                        Comment


                          #13
                          Re: HP Elitebook 840 G5 Black Screen

                          Originally posted by cvejas View Post
                          I try new bios,not working.Fan spin max,no display.
                          Ok, Cvejas write both chips with these files (16mb and 32mb)
                          Attached Files

                          Comment


                            #14
                            Re: HP Elitebook 840 G5 Black Screen

                            ok,I'll try and let you know.

                            Thanks

                            Comment


                              #15
                              Re: HP Elitebook 840 G5 Black Screen

                              Hellow mates .

                              I have they same problem, amber light blinking at power LED
                              i need clean bin file

                              here is my dump file
                              Attached Files

                              Comment


                                #16
                                hp elitebook 840 g5 no display

                                board number computro-6050A3079801-mb-A01(A1)
                                no display
                                i have attach bios to clear me
                                Attached Files

                                Comment


                                  #17
                                  Re: HP Elitebook 840 G5 Black Screen

                                  So I have 20 of these things my wife got and decided to give them to kids... unfortunately, all 20 are bios locked

                                  I have an RT809F programmer and extracted the bios 32mb bios.

                                  I used the HP Bios unlock tool and then wrote back the bios but now the caps lock light blinks then the fan runs high.

                                  I wrote back the original bios and the same issue

                                  Question
                                  1. Do I need to read and reprogram both 16mb and 32mb chips? My understanding from reading all I need to do is just the 32mb
                                    If all I have to do is just the 32mb why did it fail?
                                  2. Since I have 20 840 g5 is there generic firmware(s) I can use to just write to all and re-input serial numbers etc?
                                    If so are there detailed steps for this?
                                  Last edited by Eniaro; 06-15-2023, 11:15 AM.

                                  Comment


                                    #18
                                    Re: HP Elitebook 840 G5 Black Screen

                                    Device: laptop
                                    Brand:hp
                                    Model: 840 g5
                                    Board : 6050A2945601-mb-a01
                                    REQUEST: clear me Bios
                                    Attached Files

                                    Comment


                                      #19
                                      Re: HP Elitebook 840 G5 Black Screen

                                      Originally posted by cekwork10 View Post
                                      Device: laptop
                                      Brand:hp
                                      Model: 840 g5
                                      Board : 6050A2945601-mb-a01
                                      REQUEST: clear me Bios
                                      clear me bios ? ,you mean clean the ME firmware, or remove a password or... ?

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

                                      Comment


                                        #20
                                        Hi, I have a 840 G5 that had black screen and fan speed max, I've found a bios files 16 and 32 that works, but after to flash I have a security error on start "HP EndPoint Security Controller Problem"

                                        , I've tried to resolve with hp dmi tool but it don't works. Now I have a wrong serial and I think also wrong security o something like wrong mac address. I've attached the original files, can someone help me to solve this issue?


                                        Serial Number : 5CG9154WPG
                                        Product Number : 2FA66AV
                                        Description : HP EliteBook 840/846 G5

                                        BID = 17WWCSCT601#SABZ#DABZ
                                        FEATUREBYTE = 3X476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAdUdpdqhKhkjh.F5
                                        Attached Files

                                        Comment

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