HP probook 640 g2 - does it self destruct with bios chip removal?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Psychovich
    New Member
    • Dec 2015
    • 2
    • United States

    #21
    Re: HP probook 640 g2 - does it self destruct with bios chip removal?

    I know its a couple years later, but I have a possible theory. The HP laptops that have socketed BIOS chips are internal engineering samples. I've gotten my hands on them twice on the used market. They have Rev. B bios instead of the standard Rev. F bios most of them have. That would account for why the 1st laptop didn't work, but not the second. So I'm not sure about that. But I can confirm that the internal prototypes they use in testing do in fact come with removal bios chips. The first one I found was a 8540W with a dreamcolor screen. It had no stickers, nothing on anything, the CPU was written on with a marker. Even the case seemed hand made. I scored it off eBay years ago. I just recently scored a 810 G2 it has some stickers, it's funny the warranty says 0 years and the serial number starts with ABC and is not in their system.

    Comment

    • greg_gorrell
      New Member
      • Jul 2016
      • 2
      • USA

      #22
      Re: HP probook 640 g2 - does it self destruct with bios chip removal?

      Like others, I too have noticed the dates on this thread but as I was just directed here via a Google search, I will add some info. I was just looking into the possibility of sniffing a Bitlocker key from the TPM chip on Probook 640 G5 and see the engineering samples being mentioned as a reason for removable BIOS chip. This laptop I am contemplating the Bitlocker recovery on actually has a removable BIOS chip. A coworker has had success in both these and the G2 in removing the password, so it should be possible for you.

      Comment

      Related Topics

      Collapse

      • Vesko356
        [Guide] How to find the right HP bios version to flash
        by Vesko356
        First of all thanks to all of our members who have posted previously all methods posted here.
        Please leave a comment if you find something new,or have anything else to add.
        -----------------------------------------------------------------------------------------

        Find by serial number,model number or series

        If you know the laptop serial or model number go to HP support https://support.hp.com/us-en/drivers/laptops .
        Enter the serial number or model number and click submit.On the next screen you will have to enter the OS
        Operating system and OS version.If...
        08-11-2023, 03:27 AM
      • the_raz
        Need (unlocked) bios for HP Probook 450 G3 Notebook
        by the_raz
        I'm requesting a bios .bin for 2 of my hp Probook 450 G3's. Both of which I had forgotten the bios passwords. I stupidly flashed both of them with firmware "made" by the RCUnlocker software and I guess I shouldn't have. The last thing I did was flash both of them with RCUnlocker-fw thinking it would 100% work and left my programmer etc behind and won't have access to them for another 2 days so I figured I'd create a thread to see if I'd be so lucky that someone might have a working file laying around 😝
        Laptop number 1:
        Model: HP ProBook 450 G3
        Motherboard part number:...
        12-17-2024, 03:37 PM
      • jbonavita
        ASUS TP500LA BIOS request/repair/merge?
        by jbonavita
        Hi, my laptop wont boot at all
        With original bios no POST, only LED lights
        With alternative BIOS from model TP500LN (flashed via programmer) the notebook works again
        Some issues
        A- with bios from 500LN, it won't update from bios of model 500LA (from 500LN v203 to 500LA v300)
        B- If updated from 500LN version 203 to 300, the battery stops being recognized

        Things I tried

        1- Update / clear ME: Took the non working bios, made a backup, and did this: https://www.badcaps.net/forum/troubl...theory/trouble...
        04-29-2025, 09:38 PM
      • zenius
        [REQUEST] Dell G3 3579 BIOS Password & AMI Protected Range/BIOS Guard Unlock
        by zenius
        Hello, I have an old Dell G3 3579 (ST: 2WQ7LP2-8FC8) with a newer 8FC8 BIOS password. I have successfully attached to the flash chip (W25Q128JVSQ) on the motherboard with a CH341A programmer and made several modifications using Intel FIT (e.g., allow software SPI write) without bricking. I was also able to boot to a modified GRUB shell where I attempted to edit many BIOS security related options like BIOS Guard/Lock, Flash Signature Override, ME FW Image Re-Flash, etc.

        Unfortunately, some of these modifications like to Intel BIOS Guard failed because it is fused into the PCH. Also,...
        12-08-2024, 06:13 AM
      • Wahaz
        Lenovo Thinkbook 15 G2 ITL i5 (serial number: MP2BFZEF) bios request
        by Wahaz
        Hello,

        I have a Lenovo Thinkbook 15 G2 ITL i5 Laptop (serial number: MP2BFZEF) that when I turn it on, the led on the power button lights up for 5 seconds, then goes out. There's no display and nothing happens.
        So I thought it was a Bios problem.
        I found 3 bios chips on the board, which I read with a bios programmer: two XMC model bios chips and a Winbond model bios chip. Each XMC model bios chip has two partitions named XM25QH128A [3.3V] and XT25F128A [3.3V]. And the Winbond model bios chip has three partitions named W25Q80BL 3.3V, W25Q80xV 3.3V and W25Q80DV 3.3V....
        10-30-2023, 08:42 PM
      • Loading...
      • No more items.
      Working...