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DELL Latitude 7430 bios

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    #41
    Originally posted by shiyab View Post
    UNLOCK
    I am not lucky to get it work. I used CH341A to dump the original bios, but can not write bios. The error message: chip main memory with the contents are in disagreement. Then I bought a new program tool RT809F, the bios can be write without any error. After installed the chip, my computer doesn't show any response when press power button. I thought it maybe a bad bios file, then I flashed the original bios, the computer still no response to press power button. Is the computer bricked? What's possible reasons cause this problem? is there any solution I can try to get it work. Thanks.

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      #42
      Hello, sorry but your original BIOS file is damaged.
      Unfortunately, this happens again and again with these CH341A programmers.
      The RT809F programmer is much better, especially since it also comes with good software from the manufacturer.
      I use the RT809H myself and am very happy with it.
      Try this version built from version 1.23.0 from Dell
      There's nothing like a good backup of the original BIOS and a clean programming of the file.
      Good luck
      Attached Files

      Comment


        #43



        On the left in the picture is your damaged file, on the right is an intact file



        Attached Files

        Comment


          #44
          Originally posted by Markus1741 View Post
          Hello, sorry but your original BIOS file is damaged.
          Unfortunately, this happens again and again with these CH341A programmers.
          The RT809F programmer is much better, especially since it also comes with good software from the manufacturer.
          I use the RT809H myself and am very happy with it.
          Try this version built from version 1.23.0 from Dell
          There's nothing like a good backup of the original BIOS and a clean programming of the file.
          Good luck
          Thank you very much for the help. I flashed the bios you provided, but still doesn't work. before I hold ctrl+esc and then plug in power source, the power button will light up. now it looks the computer was not responsive to any button pressing. I think if the bios is bad, ctrl+esc method should trigger the bios recovery process and light up the power button light, right? I measured the bios vcc is only about 1.4v, I am not sure if this is normal voltage as I think the vcc should be 3.3v, right? is it possible the MB or keyboard is damaged?

          Comment


            #45
            Hello, at 1.4 volts the BIOS doesn't even start; it needs 3.3 volts.
            I also bought a used motherboard on Ebay (Lenovo T490s) and then noticed that a diode over D2101 was missing and only 1.5 volts came to pin 8.
            In this case I replaced the diode and then it worked again.
            It would also be helpful to have a picture of the soldered chip.
            Upload a picture of your chip once.
            I don't know how advanced their equipment and skills are for such repairs.
            Attached Files

            Comment


              #46
              Originally posted by Markus1741 View Post
              Hello, at 1.4 volts the BIOS doesn't even start; it needs 3.3 volts.
              I also bought a used motherboard on Ebay (Lenovo T490s) and then noticed that a diode over D2101 was missing and only 1.5 volts came to pin 8.
              In this case I replaced the diode and then it worked again.
              It would also be helpful to have a picture of the soldered chip.
              Upload a picture of your chip once.
              I don't know how advanced their equipment and skills are for such repairs.
              Thanks for sharing the information. You're right. The diode around the bios chip is bad possible due to overheat when desoldering. I checked the diode forward bias is ~1.5v, which is not normal, it should be ~0.5v. The large bias pull down the vcc. I need to find the replacement, hopefully the problem would be solved.

              Comment


                #47
                Originally posted by robbine75 View Post

                Thanks for sharing the information. You're right. The diode around the bios chip is bad possible due to overheat when desoldering. I checked the diode forward bias is ~1.5v, which is not normal, it should be ~0.5v. The large bias pull down the vcc. I need to find the replacement, hopefully the problem would be solved.
                Is it solved after diode replacement, cause I'm facing the same issue no boot after programming the bios and just the fan getting spin continuously after plugin the battery

                And is it anyware related to USH part?

                Comment


                  #48
                  Originally posted by hoaca388 View Post
                  Re: DELL Latitude 7430 need clean me



                  aaaaaaaaaa
                  thanks u ok file

                  Comment


                    #49
                    dell latitude 7430 no display
                    ST-72WXVV3
                    mother board code LA-L582P
                    Attached Files

                    Comment


                      #50
                      Hi, can anyone help me to unlock bios
                      ST - 3GPV0T3

                      Comment


                      • SMDFlea
                        SMDFlea commented
                        Editing a comment
                        Thread merged.

                      #51
                      Could you post the bios file?

                      Comment


                        #52
                        I could only get dump from other laptop

                        Comment


                          #53
                          Here
                          Attached Files

                          Comment


                            #54
                            Originally posted by Abracadabra100 View Post
                            Here
                            post both file

                            Comment


                              #55
                              thats both chips that i found on mb, there was another one, but it looks like its for usb-c
                              Attached Files

                              Comment


                                #56
                                Originally posted by Abracadabra100 View Post
                                thats both chips that i found on mb, there was another one, but it looks like its for usb-c
                                find the 8mb chip. its marked with 25q64

                                Comment


                                  #57
                                  I found it on other side of MB, but 25q64 is low profile chip and i cant reach its pins without desoldering, but thats fine. Only problem i dont have tools with me to do that, but once i get them i will try to dump it

                                  Comment


                                    #58
                                    Originally posted by Abracadabra100 View Post
                                    I found it on other side of MB, but 25q64 is low profile chip and i cant reach its pins without desoldering, but thats fine. Only problem i dont have tools with me to do that, but once i get them i will try to dump it
                                    https://shopee.vn/Bigdealsnice-Sop8-...2-a49d844c16a7


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                                    Comment


                                      #59

                                      can anyone plz unlock bios admin password
                                      dell latitude 7430
                                      LA-L581
                                      SERVICE TAG 9X7GNN3
                                      Attached Files

                                      Comment


                                        #60
                                        Originally posted by has don View Post
                                        can anyone plz unlock bios admin password
                                        dell latitude 7430
                                        LA-L581
                                        SERVICE TAG 9X7GNN3
                                        hi try
                                        Attached Files

                                        Comment

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