HP Elitebook 845 G11 bios locked

[orono]

Hi, please I need to unlock this bios, it has password.

SN: 5CG42821HN

Thank you.

[hoaca388]

HP EliteBook 845 14 inch G11 Notebook PC
CTNumber_6SSXL0B81JI2W0
Serial_5CG42821HN
Sku_AE1A7EC#ABE
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfPgSguhKjhk8mEn7nWngpDpnpqprqzr4rNrPrbs4.Rn
BuildId_24WWLUAZ602#SABE#DABE

[orono]

It is not working, computer rebooted 2-3 times and displayed the message:

The bios has recovered its identity data from the Embedded Controller due to data mismatch

So still asks for password when entering the bios. Also the CT Number you posted is from the battery, the System Board CT Number is PTLGT00WBJQ0AE, could it be related?


Thanks!

[rex98]

It is not working, computer rebooted 2-3 times and displayed the message:




So still asks for password when entering the bios. Also the CT Number you posted is from the battery, the System Board CT Number is PTLGT00WBJQ0AE, could it be related?


Thanks!

Try at first boot press f10 apply factory defaults and restart.

[orono]

Try at first boot press f10 apply factory defaults and restart.

Exact same problem than before, I get a black screen at first boot so F10 does not work. Then it reboots 2 times and displays the message I posted on #3. I have checked CRC32 after flashing to be sure the patched BIOS was written correctly to the chip.


Thanks!

[minhdigital]

Exact same problem than before, I get a black screen at first boot so F10 does not work. Then it reboots 2 times and displays the message I posted on #3. I have checked CRC32 after flashing to be sure the patched BIOS was written correctly to the chip.


Thanks!

Send to you, try !!

[orono]

Send to you, try !!

Same problem than with the 2 previous unlocked BIOS. I begin to think that HP has implemented some additional security measure on G11 series so when it detects a modified BIOS automatically restores from the EC. I can't find another HP G11 thread on the forum so I can't know for sure.

Thank you!

[qayyum786]

Same problem than with the 2 previous unlocked BIOS. I begin to think that HP has implemented some additional security measure on G11 series so when it detects a modified BIOS automatically restores from the EC. I can't find another HP G11 thread on the forum so I can't know for sure.

Thank you!

why don't you post EC bios so some one will look under backup dump

[orono]

why don't you post EC bios so some one will look under backup dump

I can't risk damaging the laptop, I don't even know where the EC is located on this particular model. And because nobody on this forum has still unlocked a G11, there is no guarantee to have this issue solved even if I disassemble the entire laptop and find the chip to extract the EC content.

If there is no alternative I still have to think what I'll do.


Nevertheless, I am very grateful for all the help. Thank you all!

[orono]

I am wondering if my problem with the BIOS auto recovering its data is related with Sure Start Gen4:

Q: What kind of attacks does HP Sure Start Gen4
protect against?
A: HP Sure Start protects against any unauthorized
changes to the BIOS code or BIOS settings, both for the
boot time code and the runtime code. These capabilities
protect you from a variety of different attacks, including
new BIOS attacks that may arise in the future.

https://images.enable.hp.com/Web/HPI...A7-2562ENW.pdf

I have a BCU dump of my BIOS settings, some of these may be relevant:

Sure Start BIOS Settings Protection
*Disable
Enable

Sure Start Secure Boot Keys Protection
Disable
*Enable

Enhanced HP Firmware Runtime Intrusion Prevention and Detection
Disable
*Enable

Sure Start Security Event Boot Notification
Time out after 15 seconds
*Require Acknowledgment

Sure Start Security Event Policy
Log Event Only
*Log Event and notify user
Log Event and power off system

SureStart Production Mode
Disable
*Enable

Also this laptop has an AMD processor with these features set on the BIOS:

AMD PSP Permanently Update FW Anti Rollback Security Level
*Do Nothing
On Next Boot

AMD PSP FW Anti Rollback Factory Security Level
1

AMD PSP FW Security Level
4

AMD PSP FW Anti Rollback Security Level
1

HP Sure Start Gen6+ is able to recover the entire AMD Secure
Processor subsystem using a copy of AMD Secure Processor
firmware stored within the HP Endpoint Security Controller isolated
non-volatile memory with no additional dependencies.

https://h20195.www2.hp.com/v2/GetDoc...e=4AA7-6645ENW (page 15)

"BIOS Settings Protection" is disabled but "Production Mode" is enabled... Any expert can confirm? I attach my complete dump. Thanks!

[cobako]

why don't you post EC bios so some one will look under backup dump

Hello, i have dump from EC flash. Can you help whith password removing? s/n 5CG4441G10

[shiyab]

Hello, i have dump from EC flash. Can you help whith password removing? s/n 5CG4441G10

hi try and feedback

[cobako]

hi try and feedback

Thanks. It is patched main bios not EC?

[shiyab]

Thanks. It is patched main bios not EC?

mani bios not ec

[cobako]

mani bios not ec

Not working. Bios recovered from EC.

[shiyab]

Not working. Bios recovered from EC.

press ok button

[cobako]

press ok button

Password still active

[krogs214]

Hi can anyone help clear the bios and disable absolute

HP ELITEBOOK 845 G11
SN: 5CG4386WW7

Thanks in advance

[krogs214]

Forgot the EC bin here it is

[shiyab]

Hi can anyone help clear the bios and disable absolute

HP ELITEBOOK 845 G11
SN: 5CG4386WW7

Thanks in advance

hi try and feedback flash mani