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latitude 5420 board LA-k491P bios problem.

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    latitude 5420 board LA-k491P bios problem.

    have a dell latitude 5420 bord LA-k491P with bios problem(does not switch on).
    the original dump is corrupted.Can someone please help?
    Attached Files

    #2
    Re: latitude 5420 bord LA-k491P bios problem.

    Here
    Attached Files


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      #3
      Re: latitude 5420 bord LA-k491P bios problem.

      Thanks will test it.

      Comment


        #4
        Re: latitude 5420 bord LA-k491P bios problem.

        not working.Machine does not even turn on.

        Comment


          #5
          Re: latitude 5420 bord LA-k491P bios problem.

          sevice tag !

          Comment


            #6
            Re: latitude 5420 bord LA-k491P bios problem.

            Originally posted by lapfix View Post
            sevice tag !
            ok.see pm.

            Comment


              #7
              Re: latitude 5420 bord LA-k491P bios problem.

              try
              Attached Files

              Comment


                #8
                Re: latitude 5420 bord LA-k491P bios problem.

                thank you so much.With this it swiches on normally but still no image.

                Comment


                  #9
                  Re: latitude 5420 bord LA-k491P bios problem.

                  Just wait a few second ,laptop may restart few times too

                  Comment


                    #10
                    Re: latitude 5420 bord LA-k491P bios problem.

                    This one is a real pain.changed the screen finally got image machine boots but after entering the service tag got an error(wrong service tag) witch is weird restarted it and no boot no image again.

                    Comment


                      #11
                      Re: latitude 5420 bord LA-k491P bios problem.

                      Originally posted by lapfix View Post
                      Just wait a few second ,laptop may restart few times too
                      I know.bad screen.thank you so much your bios works.

                      Comment


                        #12
                        dell 5420 LA-K491P PASWORD

                        could you help me unlock this bios
                        Attached Files

                        Comment


                          #13
                          Re: dell 5420 LA-K491P PASWORD

                          Originally posted by jm801 View Post
                          could you help me unlock this bios
                          Test and comments
                          Attached Files

                          Comment


                            #14
                            Re: latitude 5420 bord LA-k491P bios problem.

                            plz need help , need to unlock this dump
                            Attached Files

                            Comment


                              #15
                              Re: latitude 5420 bord LA-k491P bios problem.

                              problem solved thanks

                              Comment


                                #16
                                Re: dell 5420 LA-K491P PASWORD

                                Originally posted by aldopc View Post
                                Test and comments
                                thank you it worked you are very kind

                                Comment


                                  #17
                                  Re: latitude 5420 bord LA-k491P bios problem.

                                  please how to read this bios?
                                  laptop died after update in windows

                                  bios chip its winbond W25R256JV

                                  i have tl866II
                                  thanks

                                  Comment


                                    #18
                                    Re: latitude 5420 bord LA-k491P bios problem.

                                    Originally posted by darckreign1984 View Post
                                    please how to read this bios?
                                    laptop died after update in windows

                                    bios chip its winbond W25R256JV

                                    i have tl866II
                                    thanks
                                    It isn`t in the TL866II support list,so choose another chip, same size and voltage such as W25Q256 and untick check ID
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                                      #19
                                      Re: latitude 5420 bord LA-k491P bios problem.

                                      Originally posted by SMDFlea View Post
                                      It isn`t in the TL866II support list,so choose another chip, same size and voltage such as W25Q256 and untick check ID
                                      for tl866 it give me a schematics for so and si, in this chip are 4 pin for data In out - what to solder?

                                      IO0
                                      IO1
                                      IO2
                                      IO3


                                      and this chip dont have wp reset hold pin assigned
                                      Last edited by darckreign1984; 11-17-2022, 09:46 AM.

                                      Comment


                                        #20
                                        Re: latitude 5420 bord LA-k491P bios problem.

                                        Originally posted by darckreign1984 View Post
                                        for tl866 it give me a schematics for so and si, in this chip are 4 pin for data In out - what to solder?

                                        IO0
                                        IO1
                                        IO2
                                        IO3


                                        and this chip dont have wp reset hold pin assigned
                                        i used
                                        MOSI: Master Out Slave In (data output from master); PIN 5 TL866 TO PIN 2 IO0
                                        MISO: Master In Slave Out (data output from slave) pin 4 tl866 to pin 5 io1 - when i use this - all bin was 000000


                                        tried this variant to
                                        MOSI: Master Out Slave In (data output from master); PIN 5 TL866 TO PIN 5 IO0
                                        MISO: Master In Slave Out (data output from slave) pin 4 tl866 to pin 2 io1 - same result all bin memory 0000000
                                        Last edited by darckreign1984; 11-17-2022, 10:39 AM.

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