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Réinitialiser HP Probook 4525

Safox -  
steph810 Posted messages 1865 Registration date   Status Member Last intervention   -

Hello,

I have an HP Probook that I found in a box and I'm trying to use it, but without success. When I start it, it displays what is shown in the attached image. I have tried some grub rescue commands that I found on the internet but none work.

I do not have the admin and user BIOS passwords. When I try to use a Windows 10 USB drive (created with MediaCreationTool, and set as the first in the boot order), the same screen appears. It seems that it was previously working under Ubuntu, but I'm not sure anymore. If someone can help me, I'd appreciate it!

6 answers

  1.
    jeannets Posted messages 28397 Registration date   Status Contributor Last intervention   Ambassadeur 6 603
     

    Hello,

    There are several versions of this PC... in memory capacity, in SSD, 4 sizes... etc. We need to know..?

    It is initially running Windows 10, maybe PRO..? but there's no question of UBUNTU or grub... so explain..?

    This PC cannot find the operating system... it's trying to boot from the network and not finding it... This PC might have booted via the network in a school or a business..? And at your place, it cannot..??

    So: either the Windows SSD is dead or doesn't exist..? or has never been installed..??

    You must have a DVD or a USB stick with GRUB on it..??

    -- Very often the contents of these SSDs are encoded and compressed... it's very difficult to retrieve them to put something else... especially without knowing the procedure ++ password..

    -- Generally, SSDs are soldered onto the motherboard, not removable by the average person... to replace it with a brand new one..

    However, you should be able to enter the BIOS, display the menus, to learn a bit more about this PC..

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  2. Safox
     

    It's a 4525s (with the information in the attachment). It was running on Ubuntu but hasn't worked for some time, and I haven't touched it. I don't have the passwords to enter the BIOS and I can't seem to reset them, and I'm trying to boot the PC from a USB drive containing a Windows 10 Home image, but nothing is working, it just won't. It is indeed possible that the HDD is dead.

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    1. Safox
       

      And I just made the connection, when I run system checks, everything is fine, but when I run startup checks, they crash during the memory check step.

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  3. jeannets Posted messages 28397 Registration date   Status Contributor Last intervention   Ambassadeur 6 603
     

    It seems that this PC was running Windows 7, on 32-bit, and that the disk is not an SSD but an HDD...

    So, I think it has undergone several changes since... 2010 and especially, the battery must be quite dead.

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    1. Safox
       

      Oh yes, indeed, I completely forgot since I didn't buy it but received it from a friend who no longer used it. It was originally good under Windows 7, but I've always used it under Ubuntu (my friend changed the OS). And the battery doesn't hold well, indeed.

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  4. steph810 Posted messages 1865 Registration date   Status Member Last intervention   152
     

    OK in grub start by entering:

    ls

    And send the image we will try to reinstall grub.

    After, you do ls (hd0,gpt2) or with what displays on your screen until you see boot written in the list.

    Once you locate boot, you enter for example:

    ls (hd0,gpt2)/boot

    Then when you see vmlinuz.... something take a picture.

    Then:

    set root=(hd0,gpt2)

    Then:

    linux /boot/vmlinuz-wwww0-generic root=/dev/sda2

    If it is for example on gpt2 otherwise it will be sdaxx something corresponding to yours.

    The same for vmlinuz it must be the one corresponding to yours that you took a picture of earlier.

    Then:

    initrd /boot/initrd.img-xxxx20-generic

    And finally:

    boot

    If after that it starts in a terminal to do right away:

    sudo update-grub2

    Then:

    sudo grub-install /dev/sda

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  6. jeannets Posted messages 28397 Registration date   Status Contributor Last intervention   Ambassadeur 6 603
     

    OK, maybe we'll finally understand this PC...!

    It is very likely that this PC has a dead CMOS battery on its motherboard by now... And it no longer retains the PC configuration; the same old story repeats itself at every startup... we need to find it... check it with a voltmeter... and probably change it for a new one...

    And after that, reorganize the PC settings.

    Very good approach from "steph810" but the BIOS memory needs to keep the "Boot device" and others.

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    1. Safox
       

      having a bit of trouble at this level...

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      1. Safox > Safox
         
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  7. steph810 Posted messages 1865 Registration date   Status Member Last intervention   152
     

    Try:

    ​

    set boot=(hd0,msdos1)

    set prefix = (hd0 , msdos1) /usr/lib/grub

    insmode normal

    boot

    ​

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    1. Safox
       
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      1. steph810 Posted messages 1865 Registration date   Status Member Last intervention   152 > Safox
         

        My mistake it is

        insmod normal

        redo the manip without doing the e to insmode.

        Sorry

        Don't forget after restarting (if it starts)

        To update and install grub

        sudo update-grub

        Then:

        sudo grub-install /dev/sdaxx

        sdaxxx is the partition, it could be sda1 or sda2, do fdisk -l to see them.

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