Extract bios password from EliteBook 840 G8 Bios dump, possible?

[minhdigital]

I have a computer with administrator and absolute lock, could you help me? I tried to unlock it by comparing it with other files but it has an endpoint error
SN:5CG222503X

Send to you, try

[rex98]

I have a computer with administrator and absolute lock, could you help me? I tried to unlock it by comparing it with other files but it has an endpoint error
SN:5CG222503X

do not touch the EC.
First boot press f10 reset bios to factory defaults and exit, 2nd boot reset security settings to defaults
Use BCU here's your DMI info:

Serial Number: 5CG222503X
Product Number: 46L32UC#ACH
CT Number: PQSMT00WBGP6LL
Description: HP EliteBook 840 G8 Notebook
build_id: 21WWCVDZ602#SABA#DACH
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfPguhKhkjhk8mEmwn7nVngpDpnpqpr.78
MAC Address: 3C-18-A0-C2-BA-A0

[ganesh babu]

i need tpm reset tool for reset my hp elite i5 laptop bitlocker unlock purpose.

thanks with regards,
Ganesh babu

[izaak94]

thanks files worked 100%

[vsc]

Hello all! I have just bought Elitebook 840 G8 i7 11th gen. It has a Bios Admin password as far as I was able to see trying to F10. For the rest is OK, boots to windows, acts normally.

Yet I want to be able to change the OS installed (win11) with Linux but can't access the BIOS....

Have allready desoldered and read the Bios and EC chips.

I need the help of some knowledgeable folks for unlocking the BIOS!

Thanks in advance!!!

SN: 5CG2390NZ6
ProID: 6A3P3AV
build_id: 21WWCVET601#SABZ#DABZ

[vsc]

Here we are..

[rex98]

Here we are..

do not touch the EC.
First boot press f10 reset bios to factory defaults and exit, 2nd boot reset security settings to defaults
Use BCU here's your DMI info:

Serial Number: 5CG2390NZ6
Product Number: 6A3P3AV
CT Number: PQSNP00WBH51X1
Description: HP EliteBook 840 G8 Notebook
build_id: 21WWCVET601#SABZ#DABZ
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUcAdpdqeMfPgSguhKj4jhk8mEmVmwn7nVngpDpq.ef
MAC Address: 38-CA-84-56-38-E7

[vsc]

Thanks, let you know how is going to end..

By the way, what "BCU" stands for?

[rex98]

Thanks, let you know how is going to end..

By the way, what "BCU" stands for?

bios config utility. just search here in forum it has so many topics about it.

[sundarkanini]

Hi can you please unlock my hp elitebook 840 g8

it has a bios password and Bit locker password

mbd id: 6050A3217501-mb-a01
sn - 5cg1473pcb
prodid - 4S1H8PA

this is my backup

Thank You in Advance

[rex98]

Hi can you please unlock my hp elitebook 840 g8

it has a bios password and Bit locker password

mbd id: 6050A3217501-mb-a01
sn - 5cg1473pcb
prodid - 4S1H8PA

this is my backup

Thank You in Advance

do not touch the EC
First boot press F10 reset bios to factory defaults & Restart, 2nd boot reset security settings to defaults.
search here bios config utility in forum in case you don' know.
Use BCU to fill these DMI INFO

Serial Number: 5CG1473PCB
Product Number: 4S1H8PA#ACJ
CT Number: PKUHC00WBFYBT9
Description: HP EliteBook 840 G8 Notebook
build_id: 21WWCVCT602#SACJ#DACJ
Feature Byte: 3X476J6S6b7B7H7M7Q7W7m7saBapaqauawb8bUbhcAdUdpdqfPguhKhkjhk8mEmwnVngpD.3n
MAC Address: C8-5A-CF-E4-88-F6

[sundarkanini]

do not touch the EC
First boot press F10 reset bios to factory defaults & Restart, 2nd boot reset security settings to defaults.
search here bios config utility in forum in case you don' know.
Use BCU to fill these DMI INFO

Serial Number: 5CG1473PCB
Product Number: 4S1H8PA#ACJ
CT Number: PKUHC00WBFYBT9
Description: HP EliteBook 840 G8 Notebook
build_id: 21WWCVCT602#SACJ#DACJ
Feature Byte: 3X476J6S6b7B7H7M7Q7W7m7saBapaqauawb8bUbhcAdUdpdqfPguhKhkjhk8mEmwnVngpD.3n
MAC Address: C8-5A-CF-E4-88-F6

its worked thank u

[k3k5]

Hi,

can you unlock my hp elitebook 840 g8, please?
ProdID:16X35AV

[basalisco]

Re: Extract bios password from EliteBook 840 G8 Bios dump, possible?



Flash this both main and EC its password and absolute unlocked. at first boot be patient. after identity recovered go-to bios reset security to defaults.
give feedback please..

Hi but can these files be flashed to any 840 g8?

I think I'm talking rubbish...but while I'm waiting for an 840 G8 to arrive with a bios password to unlock, I'll try to do my best! Sorry if I asked a stupid question. If I understand, do you need a dump of both the BIOS and the EC?

[hoaca388]

Hi but can these files be flashed to any 840 g8?

I think I'm talking rubbish...but while I'm waiting for an 840 G8 to arrive with a bios password to unlock, I'll try to do my best! Sorry if I asked a stupid question. If I understand, do you need a dump of both the BIOS and the EC?

No and just need Bios or Ec.

[basalisco]

No and just need Bios or Ec.

Thanks for your kind reply. I read the discussion from the beginning, especially post #9, and studied the original files with the patched ones. Furthermore, I also tried to patch some BIOS present here and make a comparison. I must say that I achieved an excellent result by comparing my patched files and yours do not present any difference. It still remains unclear to me why other values are also moved, while there is one that is not touched as in post #9. For me it's a professional deformation, I like to understand why, it's not enough for me to have someone do it for me. Thank you all for the valuable information on this forum and sorry for my bad English.

[k3k5]

Can I find out the build_id and feature byte or recreate it?

I no longer have this after a BIOS defect

[skylinekiller]

@hoaca388
I have read through the posts, and unfortunately, it's still a little unclear. Do I need to purchase a programmer to remove/reveal the bios password, or are there files you provide to help identify or remove the password? I see people posting files, but how are they getting them if the BIOS are locked. If I do need to purchase a programmer, is there one you recommend where I don't have to remove the bios chip?

[basalisco]

@hoaca388
I have read through the posts, and unfortunately, it's still a little unclear. Do I need to purchase a programmer to remove/reveal the bios password, or are there files you provide to help identify or remove the password? I see people posting files, but how are they getting them if the BIOS are locked. If I do need to purchase a programmer, is there one you recommend where I don't have to remove the bios chip?

hi, not only do you need a programmer but the most important part is the disassembly of the PC and the IC that contains the BIOS inside, perhaps you should try to read up and do a better job of understanding what it means.

[k3k5]

Can I find out the build_id and feature byte or recreate it?

I no longer have this after a BIOS defect