HP ProBook 635 Aero G8 bios

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  • angrej4953
    Member
    • Aug 2021
    • 21
    • india

    #1

    HP ProBook 635 Aero G8 bios

    helo sir pleas fix my hp 845-g8 no display
    other bios display ok but endpoint error
    SRno. 5CG13449V4

    MOD EDIT: Model 635 Aero G8
    Attached Files
  • hoaca388
    Badcaps
    • Jan 2022
    • 11150
    • Viet Nam

    #2
    Originally posted by angrej4953
    helo sir pleas fix my hp 845-g8 no display
    other bios display ok but endpoint error
    SRno. 5CG13449V4
    HP ProBook 635 Aero G8 Notebook PC (4Q1T0PA)

    CPU side
    Attached Files


    -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
    Mọi khoản quyên góp cho Badcaps đều được hoan nghênh . Trở thành người ủng hộ Badcaps >>>>> nhấp vào liên kết này để quyên góp <<<<< Cảm ơn tất cả những người ủng hộ . -------------------------------------------------------------------------------------------------------------------------------------------------------------

    Comment

    • angrej4953
      Member
      • Aug 2021
      • 21
      • india

      #3
      Originally posted by hoaca388

      HP ProBook 635 Aero G8 Notebook PC (4Q1T0PA)

      CPU side
      THANKS SIR WORKING

      Comment


      • SMDFlea
        SMDFlea commented
        Editing a comment
        Posts moved to new thread topic,
    • wahoo28
      New Member
      • Apr 2025
      • 3
      • United Kingdom

      #4
      Many thanks in advance for any help!

      Motherboard: LANCIA13/Grizzly2.0-6050A3234201-MB-A01 (A1)
      HP ProBook 635 Aero G8 (43A03EA#ABU)
      S/N 5CG1345RXQ

      Salvage laptop with lots of external damage, powered on OK but BIOS-locked.

      I desoldered the back chip (a Winbond 25Q256JVEN) and read it twice using a CH341A programmer (same read).

      Attempted to do the ActiveNvramRegn clear (there were three or four instances) and programmed on a brand new 25Q256JVEN left from another project (see below).

      I was not expecting so many instances of ActiveNvramRegn, I salvaged a very similar 635 Aero G7 in the same way (same front/back chips, similar MB with earlier generation processor) and it only had one instance of ActiveNvramRegn, and the cleared file did unlock the BIOS and recovered it perfectly.


      Re-soldered the chip two or three times as no power-on initially (bad contacts, I'm a newbie...), eventually powered on but with endpoint security controller issue and screen flashing, with laptop unresponsive (keyboard inputs not recognised) while screen is off.

      It is not a screen issue - I forced HDMI output by unplugging the onboard screen and it is the same thing.

      Tried desoldering again, re-programmed the original "locked" file and re-soldered but it has not solved either issue (still having endpoint security and screen flashing).

      At this point I don't know if it is a BIOS/EC programming problem or if any other hardware bits have failed - closer inspection revealed some corrosion/possible liquid damage across the board contacts, which I removed with isopropyl and a brush - however, it was powering on fine with all this corrosion before removing the back chip so I don't know...

      Also tried using RCUnlocker but it requests a 16mb chip (this motherboard, as far as I can see, only has two 32mb chips front and back exactly like the 635 Aero G7 I salvaged earlier).

      Attached are the original files, I detached and read the front BIOS too this time.
      Attached Files

      Comment

      • hoaca388
        Badcaps
        • Jan 2022
        • 11150
        • Viet Nam

        #5
        Originally posted by wahoo28
        Many thanks in advance for any help!

        Motherboard: LANCIA13/Grizzly2.0-6050A3234201-MB-A01 (A1)
        HP ProBook 635 Aero G8 (43A03EA#ABU)
        S/N 5CG1345RXQ

        Salvage laptop with lots of external damage, powered on OK but BIOS-locked.
        Unlocked
        Attached Files


        -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
        Mọi khoản quyên góp cho Badcaps đều được hoan nghênh . Trở thành người ủng hộ Badcaps >>>>> nhấp vào liên kết này để quyên góp <<<<< Cảm ơn tất cả những người ủng hộ . -------------------------------------------------------------------------------------------------------------------------------------------------------------

        Comment

        • wahoo28
          New Member
          • Apr 2025
          • 3
          • United Kingdom

          #6
          Originally posted by hoaca388

          Unlocked
          Thank you so much!!

          Just a question, the BIOS now starts up in Manufacturing Program Mode with a counter, do I need to do anything else now?

          Also - if it is useful for future reference...
          After resoldering both chips, the laptop kept this screen flashing behaviour, however it only did so after the initial HP Wolf Security splash screen. It felt as if there was something hardware-related that intervened _after_ this very initial splash screen was passed.
          I disconnected everything from the motherboard (keyboard, touchpad, etc.) and restarted it exclusively with the usb-c connector giving power and connecting mouse, keyboard and screen via docking station.
          This configuration did not caused any more screen flashing.

          I re-connected the various peripherals one by one - the culprit is most definitely related to the USB-A and audio jack board. I am still not 100% sure if it is the board itself (which had quite a lot of corrosion signs before I cleaned it), the "USB wire cable" (which actually looks fairly intact) or just the ribbon cable "13MB-13USB" that has definitely some ruined tracks. I will try searching for a ribbon cable spare first...

          Comment

          • trungb271
            New Member
            • Jan 2024
            • 4
            • Việt Nam

            #7
            Hello sir, please help me fix my HP Probook 635 aero G8, HP Endpoint Security Controller Problem
            SN: JPH231Lk8S
            Attached Files

            Comment

            • lapfix
              Badcaps Legend
              • Mar 2020
              • 2564
              • my workshop

              #8
              Originally posted by trungb271
              Hello sir, please help me fix my HP Probook 635 aero G8, HP Endpoint Security Controller Problem
              SN: JPH231Lk8S
              post main bios

              Comment

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