request unlock HP EliteBook 640 G11 password bios

[Stefan Steff]

Helo every body,
I have tried modded BIOS dump on Elitebook 640 g11... Laptop restart 2 times and password return.

Thank you for your feedback!

[essaadi]

Before you give up ...please try this modded bios dump. Thanks.

Helo every body,
I have tried modded BIOS dump on Elitebook 640 g11... Laptop restart 2 times and password return.

[aminetiaret]

Hp Elitebook 640 G9
SN# 5CD3040PZ2
prodID:7N9R6PC#ACJ
Motherboard DAX8SFMB8B2 REV : B

i have Problem witg Persistence Module Cant be desactivated i only see it as active
i bought this pc from 6 months now and in windows after i received update i get this device has been disabled (evrytime i get this windows ) so i searched i found persitence module must be desactivated so if there is any chance to bypass it through bios dump or disabled i will be very thankfull

[VirVir]

Here is something interesting:

"Inside the EC’s own MCU flash (again, not in the external EC SPI we patched — lives on the Nuvoton/ITE microcontroller itself).

-than I think I found the responsable chip. NUVOTON NPCX499HA tells you anything ?-

Yes — that’s your Embedded Controller (EC).

The Nuvoton NPCX499HA is a high-end EC MCU HP uses in newer EliteBooks to handle:

• Keyboard, battery, fan control
• Power sequencing
• Firmware verification for HP Sure Start
• Storing/triggering the BIOS recovery payload

Here’s the key point:

• It has its own internal flash (not the external EC SPI chip we patched).
• HP Sure Start Gen5+ can embed a signed golden BIOS image or recovery script inside that internal flash.
• On boot, the NPCX499HA compares the main BIOS SPI against its stored hash/image, and if mismatched, pushes the “golden” image back into the main BIOS.
• This process works even if the EC’s external SPI is wiped — which is exactly what you’re seeing.

Why this matters for you
The only way to stop that recovery from the NPCX499HA is to:

1. Reflash the EC’s internal flash via its programming interface (SWD/JTAG/ICP).
2. Replace the NPCX499HA with a blank or donor chip from a similar board that doesn’t have the Sure Start payload.
3. Disable Sure Start in firmware — but that’s locked behind the same password you’re trying to remove.

Challenges:

• The internal flash is protected; without HP’s signed EC firmware, the chip will reject changes.
• Replacing the chip is possible, but it’s BGA — requires hot-air rework and exact part sourcing.
• Blank EC means you must flash both its firmware and configuration to get keyboard, charging, and power working again."

So...that particular chip lives on the other side of the MB under the keyboard...and here is where I say ENOUGH, HP has taken the security to a level that, for the moment, doesn't alow me to go any further.
If someone want's to dive dipper, be my guest.

[VirVir]

Before you give up ...please try this modded bios dump. Thanks.

I'm sorry, I'm done with this laptop. Doesn't matter what dump I flash on those chips, it gets reverted. Now I've patched 3 Chips and still recovered. Where the hell does the BIOS copy stais? I have no idea and to be honest I lost my patience...I have now the clean BIOS main, Clean EC, and clean 1MB that has the HP sure on it. Still my password returned. It's not about the dump you throw on it anymore... it's about finding the chip that keeps a copy of the original BIOS and force it back to the main and EC chips . I'll search for further information in the future . Thanks for all the help I've received here. Take care guys and much success with this laptop!

[Stefan Steff]

I did try every variants available here. Only one doesn't POST, but those that post are immediately reverted to the locked BIOS. I need to find a third Chip (usually smaller than BIOS and EC chips) that trigger that fu*king recovery. I did found a 1MB Chip that GPT says it might be responsible and patched it for me. Now I have to flash all three chips back and try again. If the recovery is still triggered I just give up...

Before you give up ...please try this modded bios dump. Thanks.

[VirVir]

can try post 32 bios once if display or not ?

I did try every variants available here. Only one doesn't POST, but those that post are immediately reverted to the locked BIOS. I need to find a third Chip (usually smaller than BIOS and EC chips) that trigger that fu*king recovery. I did found a 1MB Chip that GPT says it might be responsible and patched it for me. Now I have to flash all three chips back and try again. If the recovery is still triggered I just give up...

[Aditya11ttt]

Hey there. Back from my vacation, armed with a bunch of new BIOS chips 💪🏻 Tried both files first one starts the laptop but the password comes back, second doesn't work at all. Tried the first one only the EC file with a main file that I've done using HP recovery, started but same sh*t happened, some information on the screen telling me that the original BIOS file was recovered from the embedded memory because someone tempered with the BIOS and...the password came back. I don't know...this embedded memory controller is the EC chip or is another chip hiding on the MB? If you want to try tempering some more, my original Main and EC files are on the first post from the second page of this topic. If you can do something with them, please let me know and this weekend or the next I'll try to rewrite the Chips. The newer they are, the shitier they get ...

can try post 32 bios once if display or not ?

[VirVir]

can someone test this use the 1st one
if it doesn't work use the second one.
you should flash both main and EC
and let me know if it boots to MPM thanks.

Hey there. Back from my vacation, armed with a bunch of new BIOS chips 💪🏻 Tried both files first one starts the laptop but the password comes back, second doesn't work at all. Tried the first one only the EC file with a main file that I've done using HP recovery, started but same sh*t happened, some information on the screen telling me that the original BIOS file was recovered from the embedded memory because someone tempered with the BIOS and...the password came back. I don't know...this embedded memory controller is the EC chip or is another chip hiding on the MB? If you want to try tempering some more, my original Main and EC files are on the first post from the second page of this topic. If you can do something with them, please let me know and this weekend or the next I'll try to rewrite the Chips. The newer they are, the shitier they get ...

[Aditya11ttt]

try and feed back !!

I HAVE TEST 2 FILE. 1ST WORK BUT NOT BOOT TO MPM, STILL HAVE PASSWORD, 2ND DONT WORK
i have one 640 g11 bios pass
SN: 1H850824LY
PROD ID: A58TVUC#ABA

[black0hackers]

can someone test this use the 1st one
if it doesn't work use the second one.
you should flash both main and EC
and let me know if it boots to MPM thanks.

I HAVE TEST 2 FILE. 1ST WORK BUT NOT BOOT TO MPM, STILL HAVE PASSWORD, 2ND DONT WORK
i have one 640 g11 bios pass
SN: 1H850824LY
PROD ID: A58TVUC#ABA

[rex98]

You mean, that part should be replaced with FF or 00? For the moment I've gave up, due to lack of time and, after writing and rewriting the BIOS chip 4-5 times...it said enough and burned... I'm waiting for an order of 10 chips from AliExpress but it will take some time. Keep it touch 🤘🏻🖖🏻

you should not remove the chip if just testing, just put jumper wire and use ISP in rf809f or h.

[VirVir]

i know there's always a way. we haven't tried it yet. every security there's always a loophole. like this in g11 EC its very similar VSSTORE in bios main i haven't tried this yet, if i only have G11 laptop here i would try all possible means.

You mean, that part should be replaced with FF or 00? For the moment I've gave up, due to lack of time and, after writing and rewriting the BIOS chip 4-5 times...it said enough and burned... I'm waiting for an order of 10 chips from AliExpress but it will take some time. Keep it touch 🤘🏻🖖🏻

[rex98]

Hello guys! Found some troubling info about the HP security from 2024 onward:

HP Endpoint Security Controller 2024

Attacks against PC firmware are on the rise. Unfortunately, protecting the PC BIOS and other critical firmware is often not seen as a priority. HP addresses this with our Endpoint Security Controller (ESC), a dedicated chip that validates the integrity of the BIOS and other firmware to enhance the security of every HP business-class PC. The ESC validates that the firmware is not infected by malware before the CPU is allowed to boot. If any corruption has been detected, it will restore a clean copy held in the ESC's isolated flash. HP is the only vendor offering this unique security solution as a standard part built into business-class PCs to safeguard our customers against IT security threats.

Bottom line is...no matter if you can "unlock" the main BIOS as long as the ESC provide a backup and restore the old blocked BIOS before you can access it...

i know there's always a way. we haven't tried it yet. every security there's always a loophole. like this in g11 EC its very similar VSSTORE in bios main i haven't tried this yet, if i only have G11 laptop here i would try all possible means.

[VirVir]

Hello guys! Found some troubling info about the HP security from 2024 onward:

HP Endpoint Security Controller 2024

Attacks against PC firmware are on the rise. Unfortunately, protecting the PC BIOS and other critical firmware is often not seen as a priority. HP addresses this with our Endpoint Security Controller (ESC), a dedicated chip that validates the integrity of the BIOS and other firmware to enhance the security of every HP business-class PC. The ESC validates that the firmware is not infected by malware before the CPU is allowed to boot. If any corruption has been detected, it will restore a clean copy held in the ESC's isolated flash. HP is the only vendor offering this unique security solution as a standard part built into business-class PCs to safeguard our customers against IT security threats.

Bottom line is...no matter if you can "unlock" the main BIOS as long as the ESC provide a backup and restore the old blocked BIOS before you can access it...

[rex98]

can someone test this use the 1st one
if it doesn't work use the second one.
you should flash both main and EC
and let me know if it boots to MPM thanks.

[mesdova]

need unlock and patch
HP ELITEBOOK 640 G11
SN: 5C4377dfl
PRODID: 901d4av

bump

[VirVir]

Tried another way. Basically I've replaced the entire ME Reg part of the BIOS with info from a Firmware recovery file from the HP site. After more than one hour everything was done 👍🏻 Laptop starts and...informed me about the mismatched information and that it's doing a quick recovery ... after two restarts, the password is there of course 😖😖😖 How the h*LL can I stop it from doing this sh*t recovery? I didn't find any cmos battery on this model, the power is out long enough....How does it remember?😢😢😢

[VirVir]

HP EliteBook 640 14 inch G11 Notebook PC
CT Number_6TDWV0B81K2L4R
Serial_5CD4441CK3
Sku_B3FD3EC#ABD
Build Id_24WWREBZ601#SABD#DABD
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUcAeMfPguhKhkjhk8mEmVn7nVpDpTpnpqprqDqzrNrXrbs4.yF

Hope it unlocks. Goodluck.

Unfortunately doesn't work 😔 Some error appeared telling me that the BIOS makes some recovery from the embedded memory due to mismatch ID information...only one option and that was to click "OK" , after 2 minutes the laptop restarted and the password is still there. This is so annoying 😖😖😖 Anyway, thank you for helping!

[hoaca388]

Hello everyone! I have this Laptop with a locked BIOS 😔 I've tried unlocking the EC file but it's "Missing unlockable content" so...main BIOS, split in 2x16Mb files, RCUnlocker said it's unlocked, spits a *_unlocked.bin file, reunite the flies in a 32Mb file but... nothing changed. Verified with CMD certutil -hashfile but it's the same file as the original 🤷🏻 what's up with that? Can someone please help? 🙏🏻 Thank you 🙏🏻

5CD4441CK3 B3FD3EC#ABD

MODEL:X8V

DA0X8VMB8G0 REV.G

HP EliteBook 640 14 inch G11 Notebook PC
CT Number_6TDWV0B81K2L4R
Serial_5CD4441CK3
Sku_B3FD3EC#ABD
Build Id_24WWREBZ601#SABD#DABD
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUcAeMfPguhKhkjhk8mEmVn7nVpDpTpnpqprqDqzrNrXrbs4.yF

Hope it unlocks. Goodluck.