Elitebook 840 g3

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  • sarry86
    Senior Member
    • Jun 2021
    • 90
    • Tanzania

    #1

    Elitebook 840 g3

    Hi guys, I have this elitebook 840 g3 with model no 6050A2892301-MB-A01 that blinks five times on caps lock and num key, I would like to desolder the bios and check it using CH341A programmer, I have noticed that there are two different bioses on this board, could someone enlighten me which one is the main bios and whether I should program the main one or both? Please 🙏
    Last edited by sarry86; 02-13-2024, 02:02 PM. Reason: Fixing Typo
  • sarry86
    Senior Member
    • Jun 2021
    • 90
    • Tanzania

    #2
    I can't find the more info about this anywhere

    Comment

    • mon2
      Badcaps Legend
      • Dec 2019
      • 14337
      • Canada

      #3
      1) backup the entire flash before erasing or reflashing it

      2) share the top side pics or part number of each flash. Then review the datasheets. The larger density flash is the one that will be the main bios. Other is the ec bios.

      3) start with the main bios - be sure the voltage is correct for your flash and programming tool else the flash can be killed.

      Comment

      • sarry86
        Senior Member
        • Jun 2021
        • 90
        • Tanzania

        #4
        Originally posted by mon2
        1) backup the entire flash before erasing or reflashing it

        2) share the top side pics or part number of each flash. Then review the datasheets. The larger density flash is the one that will be the main bios. Other is the ec bios.

        3) start with the main bios - be sure the voltage is correct for your flash and programming tool else the flash can be killed.
        I have these two
        Click image for larger version

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        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india

          #5
          25Q128 is the main bios

          Comment

          • sarry86
            Senior Member
            • Jun 2021
            • 90
            • Tanzania

            #6
            Originally posted by mcplslg123
            25Q128 is the main bios
            Thanks, I tried erasing it, blank verify all went smooth, I can write the bin file to it but I get error when verifying after flashing it, could the chip be fault?

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14337
              • Canada

              #7
              Post the full details of:

              1) which programming s/w and version was used
              2) which make / model of the part was selected
              3) where exactly did the verify fail

              Comment

              • mcplslg123
                Badcaps Legend
                • Jun 2015
                • 7262
                • india

                #8
                Originally posted by sarry86

                Thanks, I tried erasing it, blank verify all went smooth, I can write the bin file to it but I get error when verifying after flashing it, could the chip be fault?
                It could be the chip itself is bad but woth updating the software for your programmer. Which programmer you used?

                Comment

                • sarry86
                  Senior Member
                  • Jun 2021
                  • 90
                  • Tanzania

                  #9
                  Originally posted by mcplslg123

                  It could be the chip itself is bad but woth updating the software for your programmer. Which programmer you used?
                  I use CH341A

                  Comment

                  • sarry86
                    Senior Member
                    • Jun 2021
                    • 90
                    • Tanzania

                    #10
                    Originally posted by mon2
                    Post the full details of:

                    1) which programming s/w and version was used
                    2) which make / model of the part was selected
                    3) where exactly did the verify fail
                    I used Neo programmer to do it and now it verify OK no problem, but the pc still gives me five blinking codes on caps lock and num lock, I have tried googling it everywhere for the schematic but no success, I have seen some requests here from the people who uses the same laptop but there's none. HP Elitebook 820 G3 6050A2892301-MB-A01

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 14337
                      • Canada

                      #11
                      Be sure that the QE bit = ‘1’.

                      Comment

                      • sarry86
                        Senior Member
                        • Jun 2021
                        • 90
                        • Tanzania

                        #12
                        Originally posted by mon2
                        Be sure that the QE bit = ‘1’.
                        I am sorry but how do I check that?

                        Comment

                        • mon2
                          Badcaps Legend
                          • Dec 2019
                          • 14337
                          • Canada

                          #13
                          Personally not aware of the exact details of your programming software but this QE bit is one of the registers present inside of the flash chip. What I am concerned about is that if you perform a full chip erase - does this also reset this QE bit to a value of '0'? If yes, then the logic board is unable to use the same flash in QSPI (quad SPI) mode. Review the details of your programming software to check if there is a QUAD or QE flag setting. You may have to review the use of another software tool to access this register. If you purchase a fresh chip with the same part number then it will be shipped to you with QE = '1'. Again, not sure if this bit resets to '0' after a full chip erase.

                          Update: Yes, your tool can do this -> review the SREG configuration and there should be a flag / checkbox for the QE bit. Share a pic of this screen but be sure it is checked to ENABLE this QSPI feature.

                          Neo Programmer New Software...22/06/2021

                          - V2.2.0.8
                          - More Chip IC's Added
                          - Fixed Bugs
                          - With SREG edit, possibility to edit QE when the bit is set, otherwise it is disabled.
                          - 100ms delay between each busy status checks during SPI 25 erase.
                          - SREG remove protection popup for erase and write SPI memories.
                          - ajout d'un delais de 10ms apres l'ecriture des status registers et 5ms dans chaque boucle de controle(sauf NAND).​
                          Last edited by mon2; 02-16-2024, 11:35 AM.

                          Comment

                          • SMDFlea
                            Super Moderator
                            • Jan 2018
                            • 21182
                            • UK

                            #14
                            Don`t worry about the QE bit .

                            840 G3 flash configuration
                            Click image for larger version

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

                            Comment

                            • piernov
                              Super Moderator
                              • Jan 2016
                              • 4437
                              • France

                              #15
                              "Quad Output Read Enabled" is set to "Yes" though.
                              OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                              Comment

                              • TECHO TN
                                Senior Member
                                • Jan 2024
                                • 59
                                • algeria

                                #16
                                Hello
                                i have thé sale model i programmed the bios many times but no result
                                the dame error everytime 3 long beeps then 2 short beeps
                                Can anyone help me?

                                Comment

                                • mon2
                                  Badcaps Legend
                                  • Dec 2019
                                  • 14337
                                  • Canada

                                  #17
                                  3 long beeps + 2 short beeps = RAM / memory error.

                                  https://youtu.be/tJWSZkIGxDg

                                  Comment

                                  • TECHO TN
                                    Senior Member
                                    • Jan 2024
                                    • 59
                                    • algeria

                                    #18
                                    Originally posted by mon2
                                    3 long beeps + 2 short beeps = RAM / memory error.

                                    https://youtu.be/tJWSZkIGxDg
                                    I changed it
                                    I tried 4 different ram but i have allways the problem

                                    Comment

                                    • Stevedb
                                      Stevedb
                                      • Feb 2018
                                      • 624
                                      • Belgium

                                      #19
                                      Check the pins for loose pins mostly the end pins are loose

                                      Comment

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