Compaq CQ71 - How can I fully dump my own BIOS?

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  • vtfe
    Member
    • Sep 2017
    • 35
    • france
    #1

    Compaq CQ71 - How can I fully dump my own BIOS?

    I have two Compaq CQ71-203sf (Intel boards).

    One is fully working, the other one does not work (seems to POST, backlight is on but no picture).

    I would like to fully dump the BIOS that is on the working machine (BIOS and all DMI info). Then I would flash it to the non-working laptop.

    Please let me know of a utility/software that could help me achieve a full BIOS dump easily.

    Thank you in advance.
    Tags: None
    • vtfe
      Member
      • Sep 2017
      • 35
      • france
      #2
      Re: Compaq CQ71 - How can I fully dump my own BIOS?

      Please also note that I have already flashed quite a few BIOS'es to the non-working PC. But the best result I had is:

      1ST BOOT
      PC will boot after flash. Caps led is on, the off, the backlight is on, but... NO picture :/. Keyboard seems to work (Ctrl+alt+Del will reboot). No VGA signal. I can even initiate a BIOS recovery with Win+B on startup and a BIOS on USB key. PC will beep during BIOS recovery.

      BUT

      2ND BOOT
      On second boot after flash, PC will still turn on. But NO backlight this time. Caps lock led is steady. Power button long press does not shut down the laptop. Keyboard does not seem to work. I have to unplug AC adapter.

      THEN

      PC will not start at all. Power led is on near the power jack, but PC will not start at all. I have to flash the BIOS again to have it boot as in "1st boot" description above.

      This is all very weird to me :/...

      Please let me know what you think. Any help appreciated

        Comment

        • jasko_jacker
          Badcaps Legend
          • Oct 2014
          • 1140
          • italy
          #3
          Re: Compaq CQ71 - How can I fully dump my own BIOS?

          To make a full dump with software it's not easy (depend of the age of the board) there is a tool fpt or for 64 bit fptw64 (you can find in intel ME System Tools ) but in most cases the operation fail due to some protection.
          Usually to obtain a dump is used a programmer after the desoldering process of the spi chip.

            Comment

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