Lenovo Thinkpad T495 AMD bios password locked

[lashamafia]

Hello, i need help for unlocking this Thinkpad T495 SN; PF-1YX1VY try autopatch but it's stay black screen,

[Maxpower3]

Hello, i need help for unlocking this Thinkpad T495 SN; PF-1YX1VY try autopatch but it's stay black screen,

try for test
at restart : enter Bios setup with F1 and need clear security chip
type password blank and load by default and save

restore original Bios after...

[lashamafia]

not working,

[Maxpower3]

no boot, black screen or music ??

[lashamafia]

fan restart every 2 seconds and keyboard light also, on my patched bios music play but stay black screen

[volinakis]

Hello, i need help for unlocking this Thinkpad T495 SN; PF-1YX1VY try autopatch but it's stay black screen,

try this, follow instruction from autopatcher

[lashamafia]

Not worked, i try now to flash bios backup and now it's have same problem not turning on fan restart and keyboard light also restarting, checked soldering it's okay what maybe problem ?

[volinakis]

It means you read bios chipset with errors, that's why Maxpower3's file didn't work, he's very good in modifying bios in a proper and working way. That's why is better to read Bios guides made by masters of this forum before doing modifications of the bios, they recommend to read bios chipset 2-3 times and compare results, if they are the same it means you got a proper bios dump.

[lashamafia]

Backup file is good i flashed it before an laptop was started, but now when i flash it it's not booting,

[Maxpower3]

startup can take a long time, sometimes several startup cycles before the light

[volinakis]

and if chipset is MX25L128 replace it with another one, i.e W25Q128, I had many troubles with this kind of chipset after erased 3 times.

[lashamafia]

Replaced bios chip and now it's working, thanks for your reply,

[volinakis]

good news but be more explicit: is patched file working?

[lashamafia]

No both files not worked, only this patched file by DYCC worked,

https://www.badcaps.net/forum/troubl...-0#post1669010

[Maxpower3]

volinakis, I sent you a message, I saw where we went wrong

[libertad_carajo]

Hi everyone,

I have a Thinkpad T495 (AMD Ryzen).
I tried to disable the BIOS supervisor password and Computrace, but I failed.
Can you please help me?

What I did so far:
I tried the autopatcher but wasn't able to succeed (black screen, beep sounds, fan spin, but no boot).
I flashed back the original BIOS: system works, but supervisor password is still active.

I attached the dump of the original BIOS (verified by reading it multiple times)

Model: 20NK (20NKS53V00)
Serial number: PF25PGKQ
BIOS version: R12ET62W1.32

It would be great if anyone could help me.
Thank you :-)

[Vesko356]

Thread merged.
Read the rules please, you must post under a related thread if it exists.

RULES UPDATE for BIOS requests/offers *AVOID BANNING, READ BEFORE POSTING*
https://www.badcaps.net/forum/troubl...before-posting

[Vesko356]

It would be great if anyone could help me.
Thank you :-)

📖⤵

Boot the machine
Press ENTER/F1/etc. to enter BIOS settings
Enter any character when asked for Supervisor Password
Press enter when it shows Hardware ID
Press space bar 2x when asked
Turn off machine
Restore original BIOS
Reset BIOS settings to factory default

[libertad_carajo]

Awesome, it worked like a charm! Thank you so much for your help!

If you don't mind sharing your knowledge: How did you create this BIOS? I would like to learn.

[Echoo]

Hello!

I use Autopatcher to create the open bios, the machine starts, but only beeps. screen is black. I am rewriting the original bios, it works, but it has a password. What could be the problem?

[Maxpower3]

Hello!

I use Autopatcher to create the open bios, the machine starts, but only beeps. screen is black. I am rewriting the original bios, it works, but it has a password. What could be the problem?

https://www.badcaps.net/forum/troubl...55#post3233555

[Echoo]

https://www.badcaps.net/forum/troubl...55#post3233555

Unfortunately, I can't do this, I don't have enough knowledge.

[Maxpower3]

Unfortunately, I can't do this, I don't have enough knowledge.

try this one to test

Lenovo T495s 20QK
The first try didn't worked out and the bios beeped 5x times (wrong checksum). UEFITool revealed the wrong hash:

FfsParser::checkProtectedRanges: Phoenix protected range [BB0000h:F30000h] hash mismatch, opened image may refuse to boot
RelativeOffset: 00BB0000h Size: 380000h
Hash: 894F0EC4AAE777028ADC60150B10ECE724FC165E6530129DD6B56E45623192E6

With the help of HxD i calculated the SHA256 of above range and replaced the old hash with the new one (search the old hash and replace it with the calculated one with help of HxD). A boot with manipulated checksum and patched BIOS binary worked. Supervisor password was removed. Thank you very much!

Donation incomming (:

[/CODE]

[Echoo]

try this one to test

Thank you very mutch! Perfect! The bios open!

[Maxpower3]

Thank you very mutch! Perfect! The bios open!

clear password and security,load by default. restart
and restore original BIOS

otherwise password disappears forever

[gsoft]

Hi I need to patch my Lenovo t495 to remove the supervisor password .
I cannot use the autopatcher because the t495 is not Intel but a Ryzen.
I make a dump of original firmware and now I ask your help to patch it.
Please can you help me?

board code: FA495 NM C131 REV. 1.0

[Acnologia]

Hi I need to patch my Lenovo t495 to remove the supervisor password .
I cannot use the autopatcher because the t495 is not Intel but a Ryzen.
I make a dump of original firmware and now I ask your help to patch it.
Please can you help me?

board code: FA495 NM C131 REV. 1.0

It doesn't work ,what you are asking
You need at least the SVOD4 or the Vertyanov.

[gsoft]

It doesn't work ,what you are asking
You need at least the SVOD4 or the Vertyanov.

Sorry I don't understand...
Is not possible to patch this bios?

I read other post where people figured out to patch but not with autopatcher. They ask and someone send the patched bios.... Can you help me please?