Bios programming bricked my HP EliteBook 850 G2

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • mr.Data
    Senior Member
    • Sep 2018
    • 78
    • Netherlands
    #1

    Bios programming bricked my HP EliteBook 850 G2

    I needed to remove a bios password from a HP EliteBook 850 G2.

    First I tried reading the bios with a SOIC8 clip but I read somewhere this wasn't working on some laptops. This is also the case with the HP EliteBook 850 G2.

    After desoldering the chip I could read the bios and make a backup. The only clean bios I did find was this one https://***********/threads/hp-elitebook-850-g2.19340/
    I programmed this bios on the chip and soldered the chip back in the motherboard. I started the laptop and the only thing it did was a blicking power button every couple of seconds and blincking front lights.
    I thought well, this bios isn't good so I desoldered it, installed the backup bios and same story after soldering it back on.

    I thought it was maybe bad soldering so I tested without a bios but I got totally different results. The power light blinked once when AC was inserted and thats it.

    What could be the problem?
    Tags: None
    • caspian
      Badcaps Legend
      • Oct 2015
      • 1591
      • Laptop
      #2
      Re: Bios programming bricked my HP EliteBook 850 G2

      First find the schematics of this laptop and mention the mainboard ID.
      Did you verify the Bios chip content after each programming?

        Comment

        • mr.Data
          Senior Member
          • Sep 2018
          • 78
          • Netherlands
          #3
          Re: Bios programming bricked my HP EliteBook 850 G2

          First find the schematics of this laptop and mention the mainboard ID.
          Where can I find this?

          I verified after the first programming. Second time I forgot. 1 connection was a bit loose but I think it made connection. I am a bit cautius to keep re-soldering the chip before I brake it.

            Comment

            • caspian
              Badcaps Legend
              • Oct 2015
              • 1591
              • Laptop
              #4
              Re: Bios programming bricked my HP EliteBook 850 G2

              you can search this forum or google it for the schematics.
              verification is very important because the Bios chip may get damaged after each reflowing due to the heat. In addition, take care whether any capacitor or resistor is displaced on the mainboard due to reflowing.
              Last edited by caspian; 11-04-2018, 02:53 AM.

                Comment

                • mr.Data
                  Senior Member
                  • Sep 2018
                  • 78
                  • Netherlands
                  #5
                  Re: Bios programming bricked my HP EliteBook 850 G2

                  If the chip is damaged. Can you see this back in reading or writing the content on it?

                    Comment

                    • caspian
                      Badcaps Legend
                      • Oct 2015
                      • 1591
                      • Laptop
                      #6
                      Re: Bios programming bricked my HP EliteBook 850 G2

                      A Bios damage may be hidden when reading or writing. but it can be detected when verifying. It is also possible that some other component is damaged, and not the Bios IC. but this case should be tested after ensuring Bios is healthy.

                        Comment

                        • mr.Data
                          Senior Member
                          • Sep 2018
                          • 78
                          • Netherlands
                          #7
                          Re: Bios programming bricked my HP EliteBook 850 G2

                          How would I detect it and which software should I be using? I dont think other components are damaged because there are no near components which got hot.

                            Comment

                            • caspian
                              Badcaps Legend
                              • Oct 2015
                              • 1591
                              • Laptop
                              #8
                              Re: Bios programming bricked my HP EliteBook 850 G2

                              your programmer software probably does the verification too.

                                Comment

                                Previous template Next

                                Related Topics

                                Collapse
                                • cr4zychriss
                                  [Problem/ Request] Bricked TongFang GK7MRFR BIOS
                                  by cr4zychriss
                                  Hello everyone,
                                  I am requesting urgent assistance to unbrick my laptop, a rebranded TongFang GK7MRFR chassis. The laptop is completely dead following a faulty in-OS EC flash attempt.
                                  I have successfully used a CH341A programmer and can read/write/verify both flash chips, but using my backups/extractions has failed to restore power. The root cause is likely a corrupted Intel Management Engine (ME) region or an incompatible EC/BIOS pairing. System & Hardware Details
                                  • Barebone / Chassis: TongFang GK7MRFR
                                  • MB: MB: GK5MP5X V1.0 Prod :GK5MRFV10T04201310281
                                  • Rebrand: PC Specialist
                                  ...
                                  11-14-2025, 04:04 PM
                                • Guest
                                  Elitebook 850 G5 BIOS bricked
                                  by Guest
                                  Hello,

                                  I have an EliteBook 850 G5. After a Windows update, including a BIOS update, the notebook turns on, but the screen remains black, and the fans spin at high speed—nothing else happens.

                                  I assume the BIOS update failed, so I searched for the BIOS chip.

                                  I found a Winbond chip located between the RAM and the hard drive, which has a size of 32 MB.

                                  However, the BIOS update available on HP's website is only 17 MB in size. I used the update version that was previously installed when the notebook was still working.

                                  Can the corrupted...
                                  03-24-2025, 01:21 AM
                                • Wutru
                                  HP Elitebook 820 G4 BIOS repair assistance required
                                  by Wutru
                                  Hi guys,

                                  If someone would be able to provide some expertise, I'd be very grateful.

                                  BIOS Corruption - Cause
                                  So I managed to corrupt my machine by installing linux and enrolling custom secure boot keys. I did choose to enroll the Microsoft keys as well, to prevent any potential bricking due to 3rd party drivers from HP being signed with those keys.
                                  After doing that, and rebooting(it did boot, powerLED, fanspin etc.), the laptop did not give any video output on the LCD or video connectors. I think I was able to get in BIOS and trigger the beeper by pressing ESC....
                                  09-06-2025, 10:32 AM
                                • studdy05
                                  Bricked HP Probook 450 G7 Bios questions
                                  by studdy05
                                  Hp Probook 450 G7 s# SCD0348W35 had a locked BIOS. Bought BIOS and EC chips off Ebay that were supposed to match this machine - the 450 G7. Flashed in the BIOS on chip i bought using a CH341. BIOS unlocked next boot. Some error to contact HP. Entered BIOS and reset to system defaults and rebooted. Machine worked fine but every cold boot the contact HP message popped and everything else worked as fine. Assumed the error was from EC chip not matching BIOS that i just flashed in. So i flashed in the EC that was supposed to match from the EBay chip i bought and instant brick.

                                  Ive got...
                                  07-08-2025, 09:24 PM
                                • STKR123
                                  The right BIOS Programmer - The right software (HP Elitebook 820 G1, 840 G2) no soldering, EC, DMI, ME
                                  by STKR123
                                  Greetings badcaps community,

                                  I havent done this for a long time and want to start it all again, after some evil and annyoing illness.
                                  So I apologize in advance, if some phrases might sound a bit like gibberish or illogical to you.

                                  Im trying my best to fully describe what I plan to achieve and hope I was choosing the right sub-forum for my new adventure.

                                  I have a Elitebook 820 G1 and a Elitebook 840 G2 here.

                                  These ask for a password when entering the BIOS, but boot just fine from the internal SSD.

                                  I learned that desoldering...
                                  10-29-2024, 06:03 AM
                                • Loading...
                                • No more items.
                                Working...