[Lenovo] Where is the BIOS password stored

[zRedaxz]

Hi,

This is a generic question regarding Lenovo t460s/t470/t480. Where is the BIOS password stored?
I found a winbond chip and I was able to read the content just fine. I can open it with UEFITool so this is the UEFI.
I read it from my test machine and I just flashed it to my other test machine with no issue. However the password remained the same.
So where is the BIOS password stored and how can I overwrite it?

thank you!

[mcplslg123]

Re: [Lenovo] Where is the BIOS password stored

There is a dedicated security chip on most thinkpads where password is stored. So flashing the main bios is useless. Sometimes shorting the sda & scl pins of the security chip removes it but in most cases you need to buy a patch.

[zRedaxz]

Re: [Lenovo] Where is the BIOS password stored

There is a dedicated security chip on most thinkpads where password is stored. So flashing the main bios is useless. Sometimes shorting the sda & scl pins of the security chip removes it but in most cases you need to buy a patch.

Thank you! Is this security chip the ThinkEngine chip?

[SMDFlea]

Re: [Lenovo] Where is the BIOS password stored

Thank you! Is this security chip the ThinkEngine chip?

No, its a MEC1633L or equivalent. https://www.allservice.ro/forum/viewtopic.php?t=3044

[rbvndonh]

Re: [Lenovo] Where is the BIOS password stored

Lenovo autopatcher will solve it?

[hoaca388]

Re: [Lenovo] Where is the BIOS password stored

Lenovo autopatcher will solve it?

Not all.