HP Spectre XT Touchsmart 15-4011nr LA-8551P decrypt update

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  • Mazorca
    Badcaps Veteran
    • Jan 2017
    • 463
    • USA
    #1

    HP Spectre XT Touchsmart 15-4011nr LA-8551P decrypt update

    I am having trouble decrypting the bios executable bin. I managed to get the bin but it is too big and nowhere looks like a bios. There are no identifing labels on the laptop bottom, I am taking my guess from the Bios dump and model on the touchscreen. Inside original bios are: C2M73UA#ABA and BID 01886.F12. Motherboard is labeled as LA-8551P and 700814-501. Symptoms are no video output, lighted keyboard keys (has backlight), keys beep when pressed, esc key does not, battery charging light is orange for a few seconds, turns white later. Mobo has onboard RAM chips, and uses DDR3L single RAM slot. Consumes ~35mA when connected to bench power supply, goes upt to 695mA when power button pressed. Video card chip gets hot, fan turns on after a few minutes.
    I have cleaned the ME region, same symptoms. Downloaded the BIOS executable from HP update, managed to extract a bin but I ran into trouble.
    Could someone either guide me, decrypt said bin or fix my bios dump, I would greatly appreciate it.
    Attached Files
    Tags: None
    • peste
      Super Moderator
      • Dec 2016
      • 12346
      • ROMANIA
      #2
      Re: HP Spectre XT Touchsmart 15-4011nr LA-8551P decrypt update

      Originally posted by Mazorca
      I am having trouble decrypting the bios executable bin. I managed to get the bin but it is too big and nowhere looks like a bios. There are no identifing labels on the laptop bottom, I am taking my guess from the Bios dump and model on the touchscreen. Inside original bios are: C2M73UA#ABA and BID 01886.F12. Motherboard is labeled as LA-8551P and 700814-501. Symptoms are no video output, lighted keyboard keys (has backlight), keys beep when pressed, esc key does not, battery charging light is orange for a few seconds, turns white later. Mobo has onboard RAM chips, and uses DDR3L single RAM slot. Consumes ~35mA when connected to bench power supply, goes upt to 695mA when power button pressed. Video card chip gets hot, fan turns on after a few minutes.
      I have cleaned the ME region, same symptoms. Downloaded the BIOS executable from HP update, managed to extract a bin but I ran into trouble.
      Could someone either guide me, decrypt said bin or fix my bios dump, I would greatly appreciate it.
      bios extracted from the HP site update.
      Attached Files
      Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

      >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

      Every donation made will go towards server fees and maintenance costs.

        Comment

        • Mazorca
          Badcaps Veteran
          • Jan 2017
          • 463
          • USA
          #3
          Re: HP Spectre XT Touchsmart 15-4011nr LA-8551P decrypt update

          Thank you peste, I still have no video on the touchscreen but I DO have video output on HDMI, so your bios works. I'm happy because finally after a couple of weeks I have something to work with. I'm going to check the touchscreen and LCD cable next. I did use the suggested tool (thank you to the mod), even ran it manually, but it gives me an error:

          C:\Users\Sergio\Downloads\phoenixtool273>hewprsa.exe -d 01886.bin -o 01886.DEC { -s 01886.SIG }
          Processing... This might take a few seconds.
          Header: BIOS_OFFSET:20[14] BIOS_SIZE:8388608[800000] BIOS_SIGN_SIZE:256[100]
          sizes do not match!
          10824:error:0407006A:rsa routines:RSA_padding_check_PKCS1_type_1:block type is not 01:.\crypto\rsa\rsa_pk1.c:100:
          10824:error:04067072:rsa routines:RSA_EAY_PUBLIC_DECRYPT:padding check failed:.\crypto\rsa\rsa_eay.c:699:
          decipher failed: Permission denied
          ERROR: "No such device"

          What do you make of it? Look for an earlier date tool? I'm using the latest one.

            Comment

            • peste
              Super Moderator
              • Dec 2016
              • 12346
              • ROMANIA
              #4
              Re: HP Spectre XT Touchsmart 15-4011nr LA-8551P decrypt update

              Originally posted by Mazorca
              Thank you peste, I still have no video on the touchscreen but I DO have video output on HDMI, so your bios works. I'm happy because finally after a couple of weeks I have something to work with. I'm going to check the touchscreen and LCD cable next. I did use the suggested tool (thank you to the mod), even ran it manually, but it gives me an error:

              C:\Users\Sergio\Downloads\phoenixtool273>hewprsa.exe -d 01886.bin -o 01886.DEC { -s 01886.SIG }
              Processing... This might take a few seconds.
              Header: BIOS_OFFSET:20[14] BIOS_SIZE:8388608[800000] BIOS_SIGN_SIZE:256[100]
              sizes do not match!
              10824:error:0407006A:rsa routines:RSA_padding_check_PKCS1_type_1:block type is not 01:.\crypto\rsa\rsa_pk1.c:100:
              10824:error:04067072:rsa routines:RSA_EAY_PUBLIC_DECRYPT:padding check failed:.\crypto\rsa\rsa_eay.c:699:
              decipher failed: Permission denied
              ERROR: "No such device"

              What do you make of it? Look for an earlier date tool? I'm using the latest one.
              check the video chip ... it can be detached from the motherboard ... I didn't understand why you used Phoenixtool ...
              Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

              >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

              Every donation made will go towards server fees and maintenance costs.

                Comment

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