Bmax b2 plus

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  • Claudiomfa
    Badcaps Veteran
    • Nov 2015
    • 455
    • Portugal
    #1

    Bmax b2 plus

    Good afternoon people,

    I have a problem on my hands that I can't find the problem.

    I have a broken bmax b2plus that gives the logo the brand and does not enter the bios or boot to the OS. I already fixed the bios and it didn't fix it. I already have the original bios from the manufacturer and flashed it and it didn't fix it. Now I was trying to replace the bios chip with a new one but it is not working. What happens is that the original chip of the machine is the W25Q64FWSIQ and the one I am replacing is the W25Q64FWSIG, but with the W25Q64FWSIG the machine does not start nor the image (with the same file read from the W25Q64FWSIQ).

    I've been looking at the datasheet and both chips are the same. Can anyone tell me why this new chip doesn't work on this machine?

    I've already recorded both chips with the RT809H, TL866A, CH341A and with SVOD3 and it doesn't solve the problem.
    Tags: None
    • Repdata
      Senior Member
      • May 2020
      • 67
      • Deutschland
      #2
      Re: Bmax b2 plus

      do you have communication on the data lines from the bios chip?

      works with an oscilloscope if you don't have one you can also use an LED

        Comment

        • Claudiomfa
          Badcaps Veteran
          • Nov 2015
          • 455
          • Portugal
          #3
          Re: Bmax b2 plus

          Originally posted by Repdata
          do you have communication on the data lines from the bios chip?

          works with an oscilloscope if you don't have one you can also use an LED
          I don't have the equipment right now. But how do I test with a led?

          What pins of the chip do I need to test on? On pin 2 and 5?

            Comment

            • piernov
              Super Moderator
              • Jan 2016
              • 4435
              • France
              #4
              Re: Bmax b2 plus

              W25q64fwssig: Qe=0
              w25q64fwssiq: Qe=1
              OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                Comment

                • Claudiomfa
                  Badcaps Veteran
                  • Nov 2015
                  • 455
                  • Portugal
                  #5
                  Re: Bmax b2 plus

                  Originally posted by piernov
                  W25q64fwssig: Qe=0
                  w25q64fwssiq: Qe=1
                  @Piernov how can I get this chip working? Just change Qe to 0 or 1 on the new chip? Or do I have to buy an exact same chip?

                    Comment

                    • 18664520780
                      New Member
                      • Aug 2023
                      • 1
                      • 中国
                      #6
                      Re: Bmax b2 plus

                      HI,

                      Anyone have a bios dump from Bmax b2 plus?

                      thanks

                        Comment

                        • Sa33nS
                          New Member
                          • Jan 2025
                          • 7
                          • Россия
                          #7
                          Originally posted by 18664520780
                          Re: Bmax b2 plus

                          HI,

                          Anyone have a bios dump from Bmax b2 plus?

                          thanks
                          Hi!

                          If you haven't found it yet, try it. -

                          Bmax b2 plus bios - Badcaps​

                          👌

                            Comment

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